Operations and

Question $5,4\mathrm{.}4\mathrm{.}31$

Find $AC,$ if possible.

$A=\left[\begin{array}{ccc}5& -2& 4\\ 0& 5& -4\end{array}\right]$

$C=\left[\begin{array}{ccc}-2& 0& 4\\ 2& -2& 3\\ -5& 3& 2\end{array}\right]$

Select the correct choice below and, if necessary, fill in the answer box to complete your choice.

A$.AC=($Simplify your answer.$)$

B$.$ The matrix $AC$ is not defined.