Determine whether the product is defined. If it is defined, find the product; if it is not, say \"not defined.\"
\begin{bmatrix} -3 & 4 & 0 \\ -4 & -2 & -1 \end{bmatrix} \begin{bmatrix} -1 & -4 \\ -4 & 1 \\ 0 & -1 \end{bmatrix}
Select the correct choice below and, if necessary, fill in the answer box to complete your choice.
A. The product is defined. $\begin{bmatrix} -3 & 4 & 0 \\ -4 & -2 & -1 \end{bmatrix} \begin{bmatrix} -1 & -4 \\ -4 & 1 \\ 0 & -1 \end{bmatrix} = \boxed{}$
B. The product is not defined.
