Find the Matrix Product AB, If It Is Defined A) $A B$

Multiple Choice

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

A) $A B$ is undefined.
B)
$$\left[ \begin{array} { r r } 12 & 0 \\0 & 8\end{array} \right]$$
C)
$$\left[ \begin{array} { r r } 12 & - 6 \\- 8 & 12 \\4 & - 4\end{array} \right]$$

D)

$$\left[ \begin{array} { r r r } 12 & - 8 & 4 \\- 6 & 12 & - 4\end{array} \right]$$