How to include graphics with width in the exam class?

Question

I am trying to compose an exam with a figure as part of the question. However, I am having trouble using the standard \includegraphics command with pdflatex. I can not specify the arguments to \includegraphics in the square brackets. If I remove the square bracket (optional arguments), then it compiles without issue. I've tried wrapping it in the \fullwidth{} command to no avail.

Here is a minimal example:

\documentclass[addpoints,11pt]{exam}
\usepackage{graphics}
\begin{document}
\begin{questions}
\question[] True/False questions.
\begin{parts}
\part[2] True or False.\vspace*{1in}
An image:
\begin{figure}    
\includegraphics[width=\textwidth]{file-which-exists}  
\end{figure}
\end{parts}
\end{questions}

\end{document}`

Answer 1

You are loading the wrong package: it's not graphics, but graphicx

There's no need to use a figure environment: center or flushleft will do as well (but none of them is really necessary). Just think to the graphic object as a big character.