Find the Product AB, If Possible A) $\mathrm { AB }$

Multiple Choice

Find the product AB, if possible.
- $A = \left[ \begin{array} { r r r } 3 & - 2 & 1 \\ 0 & 4 & - 3 \end{array} \right] , B = \left[ \begin{array} { r r } 4 & 0 \\ - 2 & 3 \end{array} \right]$

A) $\mathrm { AB }$ is not defined.
B)
$\left[ \begin{array} { r r r } 12 & - 8 & 4 \\ - 6 & 16 & - 11 \end{array} \right]$
C)
$\left[ \begin{array} { r r } 12 & - 6 \\ - 8 & 16 \\ 4 & - 11 \end{array} \right]$
D)

$\left[ \begin{array} { r r } 12 & 0 \\ 0 & 12 \end{array} \right]$