Among the four products given below, which is most likely to have the lowest mismatch costs expressed as a percentage of maximum profit? (See attached PDF.)

\begin{tabular}{|c|c|c|c|} \hline Product & Mean of demand & Standard deviation of demand & Critical ratio \\ \hline A & 500 & 300 & 0.6 \\ \hline B & 300 & 100 & 0.7 \\ \hline C & 600 & 500 & 0.4 \\ \hline D & 400 & 200 & 0.5 \\ \hline \end{tabular}