\documentclass[a4paper]{article}

\usepackage[utf8]{inputenc}    
\usepackage[T1]{fontenc}

\usepackage[francais,bloc,completemulti]{automultiplechoice}    
\begin{document}

\newsavebox{\correcbox}

%\savebox{\correcbox}{\parbox{5cm}{\color{red}{Ici\\ou\\là…}}}

\savebox{\correcbox}{\parbox{5cm}{\color{red}{Here a linebreak\\or\\here...}}}

\exemplaire{10}{    

%%% debut de l'en-tête des copies :    

\noindent{\bf QCM  \hfill TEST}

\vspace*{.5cm}
\begin{minipage}{.4\linewidth}
\centering\large\bf Test\\ Examen du 01/01/2008\end{minipage}
\champnom{\fbox{    
                \begin{minipage}{.5\linewidth}
                  Nom et prénom :

                  \vspace*{.5cm}\namefielddots   
                  \vspace*{1mm}
                \end{minipage}
         }}



\begin{question}{ouverte}
	Donnez la définition de l’inflation.
	
	\AMCOpen{lines=5, answer= \usebox{\correcbox}}{\mauvaise[F]{f}\bareme{0}\mauvaise[P]{p}\bareme{1}\bonne[J]{j}\bareme{2}}
\end{question}
% \AMCaddpagesto{3} 

}   

\end{document}
