Compute the Product or State That It Is Undefined $$\left[ \begin{array} { l l l } - 7 & 2 & 7\end{array} \right] \left[ \begin{array} { r } 3 \\0 \\- 3\end{array} \right]$$

Multiple Choice

Compute the product or state that it is undefined.
- $$\left[ \begin{array} { l l l } - 7 & 2 & 7\end{array} \right] \left[ \begin{array} { r } 3 \\0 \\- 3\end{array} \right]$$

A)
[141]

B)
$\left[ \begin{array} { r } - 21 \\ 0 \\ - 21 \end{array} \right]$

C)

$\left[ \begin{array} { l l l } - 21 & 0 & - 21 \end{array} \right]$
D)

[-42]