Dans quel dessin la surface grisée est-elle la plus grande ?
\begin{multicols}{5}
  \begin{enumerate}[A/]
  \item \includegraphics{Kang2001B06.1}
  \item \includegraphics{Kang2001B06.2}
  \item \includegraphics{Kang2001B06.3}
  \item \includegraphics{Kang2001B06.4}
  \item \includegraphics{Kang2001B06.5}
  \end{enumerate}
\end{multicols}