When using exam with multiple choice questions, how can you ensure that the question and all of the choices will appear on the one page?

Question

I have a simple multiple choice question, I would like to ensure that the question and all choices appear on the same page. I have seen previous suggestions that you should embed the question in a minipage, but that affects the spacing between questions. Is there any other ideas that could accomplish this?

    1. What is the time?

    A) 1o'clock
    B) 1o'clock
    C) 1o'clock
    D) 1o'clock

Here is an example of a fix with minipage that requires vspace to fix vertical spacing issues.

\documentclass[a4paper,12pt,addpoints]{exam} 
\usepackage{graphicx}
\usepackage{anyfontsize}

\makeatother

\graphicspath{{\subfix{../images/}}}

\begin{document}


\sffamily
\newpage
{\Large\textbf{Section I - Multiple Choice}}

\textbf{Total Marks}

\textbf{Attempt All Questions}

\textbf{Allow About 12 Minutes for these questions}

Use the multiple choice answer sheet

Select the alternative A, B, C or D that best answers the question.
\vspace{0.4cm}\hrule\vspace{1cm}
\begin{questions}
    \begin{minipage}{\linewidth}
        \question What time is it?\hfill
        \vspace*{0.5cm}
        \begin{choices}
            \CorrectChoice 1 o'clock
            \choice 2 o'clock
            \choice 3 o'clock 
            \choice 4 o'clock
        \end{choices}
        \vspace*{0.5cm}
    \end{minipage}
    \begin{minipage}{\linewidth}
        \question What time is it?\hfill
        \begin{choices}
            \CorrectChoice 1 o'clock
            \choice 2 o'clock
            \choice 3 o'clock 
            \choice 4 o'clock
        \end{choices}
    \end{minipage}
    \begin{minipage}{\linewidth}
        \question What time is it?\hfill
        \begin{choices}
            \CorrectChoice 1 o'clock
            \choice 2 o'clock
            \choice 3 o'clock 
            \choice 4 o'clock
        \end{choices}
    \end{minipage}
    \begin{minipage}{\linewidth}
        \question What time is it?\hfill
        \begin{choices}
            \CorrectChoice 1 o'clock
            \choice 2 o'clock
            \choice 3 o'clock 
            \choice 4 o'clock
        \end{choices}
    \end{minipage}
    \begin{minipage}{\linewidth}
        \question What time is it?\hfill
        \begin{choices}
            \CorrectChoice 1 o'clock
            \choice 2 o'clock
            \choice 3 o'clock 
            \choice 4 o'clock
        \end{choices}
    \end{minipage}
    \begin{minipage}{\linewidth}
        \question What time is it?\hfill
        \begin{choices}
            \CorrectChoice 1 o'clock
            \choice 2 o'clock
            \choice 3 o'clock 
            \choice 4 o'clock
        \end{choices}
    \end{minipage}
    \begin{minipage}{\linewidth}
        \question What time is it?\hfill
        \begin{choices}
            \CorrectChoice 1 o'clock
            \choice 2 o'clock
            \choice 3 o'clock 
            \choice 4 o'clock
        \end{choices}
    \end{minipage}
    \begin{minipage}{\linewidth}
        \question What time is it?\hfill
        \begin{choices}
            \CorrectChoice 1 o'clock
            \choice 2 o'clock
            \choice 3 o'clock 
            \choice 4 o'clock
        \end{choices}
    \end{minipage}
    
    


\end{questions}
\end{document}

Answer 1

This code adds the minipages to the choices environment. It also adds some (optional) space (with \vspace{0.5cm}) before and after the choices.

It will keep the question and all of its choices on the same page.

\documentclass[a4paper,12pt,addpoints]{exam} 
\usepackage{graphicx}
\usepackage{anyfontsize}    

\graphicspath{{\subfix{../images/}}}

% From https://tex.stackexchange.com/a/224654/161015 ***************<<<<<<<<<<<<<<<<<<<
\usepackage{etoolbox}
\BeforeBeginEnvironment{choices}{\vspace*{0.5cm}\par\nopagebreak\minipage{\linewidth}}
\AfterEndEnvironment{choices}{\vspace*{0.5cm}\endminipage}
%*******************************************************

\begin{document}
    
    \sffamily
    \newpage
    {\Large\textbf{Section I - Multiple Choice}}
    
    \textbf{Total Marks}
    
    \textbf{Attempt All Questions}
    
    \textbf{Allow About 12 Minutes for these questions}
    
    Use the multiple choice answer sheet
    
    Select the alternative A, B, C or D that best answers the question.
    \vspace{0.4cm}\hrule\vspace{1cm}
    
    %\vspace*{1.3cm} % USE to test.     \vspace*{1.4cm} will make question 4 go tho the next page

\begin{questions}
    \question What time is it?\hfill
    \begin{choices}
        \CorrectChoice 1 o'clock
        \choice 2 o'clock
        \choice 3 o'clock 
        \choice 4 o'clock
    \end{choices}
    \question What time is it?\hfill
    \begin{choices}
        \CorrectChoice 1 o'clock
        \choice 2 o'clock
        \choice 3 o'clock 
        \choice 4 o'clock
    \end{choices}
    \question What time is it?\hfill
    \begin{choices}
        \CorrectChoice 1 o'clock
        \choice 2 o'clock
        \choice 3 o'clock 
        \choice 4 o'clock
    \end{choices}
    \question What time is it?\hfill
    \begin{choices}
        \CorrectChoice 1 o'clock
        \choice 2 o'clock
        \choice 3 o'clock 
        \choice 4 o'clock
    \end{choices}
    \question What time is it?\hfill
    \begin{choices}
        \CorrectChoice 1 o'clock
        \choice 2 o'clock
        \choice 3 o'clock 
        \choice 4 o'clock
    \end{choices}
    \question What time is it?\hfill
    \begin{choices}
        \CorrectChoice 1 o'clock
        \choice 2 o'clock
        \choice 3 o'clock 
        \choice 4 o'clock
    \end{choices}
\end{questions}
\end{document}

It can be tested adding some vertical space after the rule and before the question. For example \vspace*{1.4cm} will make question #4 and its choices go to the next page.