How does the enumitem package place the labels?

Question

In the following screenshot, I would like the 1st item A) in the inline mode to be at the same level of indentation of the labels A) to D) in the first list.

To do that I would like to know how the enumitem package places the labels.

Here is the code that I've used.

\documentclass{article}
    \usepackage[utf8]{inputenc}
    \usepackage{amsmath}
    \usepackage{enumitem}

    \newlist{choices}{enumerate}{1}
    \setlist[choices]{label*=\Alph*)}
    \newcommand{\choice}{\item}

    \newcounter{choice}
    \renewcommand\thechoice{\Alph{choice}}
    \newcommand\choicelabel{\thechoice)}
    \newcommand\choicestarlabel{{\large $\square$}}

    \newenvironment{inlineChoices}{%
        \setcounter{choice}{0}%
            \def\choice{%
            \refstepcounter{choice}%
            \ifnum\value{choice}>1\relax
                \penalty -50\hskip 1em plus 1em\relax
            \else
                \hspace{\labelindent}% WRONG SPACING !!!
            \fi
            \choicelabel
            \nobreak\enskip
        }%
        \ifvmode\else\enskip\fi
        \ignorespaces
    }{}

\begin{document}

\noindent Bla, bla, bla, bla, bla, bla, bla, bla, bla, bla, bla

\begin{choices}
    \choice $\dfrac{4}{7}$
    \choice $\dfrac{8}{24}$
    \choice $\dfrac{44}{121}$
    \choice $\dfrac{9}{11}$
\end{choices}

\noindent Bla, bla, bla, bla, bla, bla, bla, bla, bla, bla, bla

\begin{inlineChoices}
    \choice $\dfrac{4}{7}$
    \choice $\dfrac{8}{24}$
    \choice $\dfrac{44}{121}$
    \choice $\dfrac{9}{11}$
\end{inlineChoices}

\end{document}

Answer 1

Your inline list gets the spacing you are giving it and the normal paragraph indentation, the code below ensures it starts with \noindent if at the start of a paragraph and then gets what I think is the right indentation, depending on the space you want between items.

    \newenvironment{inlineChoices}{%
\ifvmode\noindent\fi
\hspace*{\leftmargini}%
\hspace*{-\labelwidth}%
        \setcounter{choice}{0}%
            \def\choice{%
            \refstepcounter{choice}%
            \ifnum\value{choice}>1\relax
                \penalty -50\hskip 1em plus 1em\relax
            \else
\hspace*{\itemindent}%
            \fi
            \choicelabel
            \nobreak\enskip
        }%
        \ifvmode\else\enskip\fi
        \ignorespaces
    }{}

Answer 2

Using the [inline] option of enumitem makes doing this sort of list simpler. Since these lists are designed to be used in running text, you would need to wrap them in some sort of environment to deal with the spacing issues; I've ignored this in my example, however. I've made the between item separation (itemjoin) \qquad. You can change this as needed. Based on your comments, I've also used the parskip package for setting a zero parindent. Then I've used leftmargin=* and align=left for the regular choices list to make the labels align properly.

\documentclass{article}
\usepackage[utf8]{inputenc}
\usepackage{amsmath}
\usepackage[inline]{enumitem}
\usepackage{parskip} % for zero par indent the right way

\newlist{choices}{enumerate}{1}
\newlist{inlinechoices}{enumerate*}{1}
\setlist[inlinechoices]{label*={\Alph*)},itemjoin={\qquad}}
\setlist[choices]{label*={\Alph*)},leftmargin=*,align=left}
\newcommand{\choice}{\item}


\newcounter{choice}
\renewcommand\thechoice{\Alph{choice}}
\newcommand\choicelabel{\thechoice)}
\newcommand\choicestarlabel{{\large $\square$}}


\begin{document}

 Bla, bla, bla, bla, bla, bla, bla, bla, bla, bla, bla

\begin{choices}
    \choice $\dfrac{4}{7}$
    \choice $\dfrac{8}{24}$\label{824}
    \choice $\dfrac{44}{121}$
    \choice $\dfrac{9}{11}$
\end{choices}

 Bla, bla, bla, bla, bla, bla, bla, bla, bla, bla, bla As in \ref{824}
\bigskip

\begin{inlinechoices}
    \choice $\dfrac{4}{7}$
    \choice $\dfrac{8}{24}$
    \choice $\dfrac{44}{121}$\label{44}
    \choice $\dfrac{9}{11}$
\end{inlinechoices}
\bigskip

\noindent Bla, bla, bla, bla, bla, bla, bla, bla, bla, bla, bla As in \ref{44}

\end{document}