A) $\text { [10 } 7 \text { 61] }$

Multiple Choice

$A = \left[ \begin{array} { l l l } - 7 & - 2 & 5\end{array} \right] \text { and } B = \left[ \begin{array} { r r r } - 1 & - 3 & - 9 \\1 & 2 & - 4 \\1 & - 2 & - 2\end{array} \right]$

A) $\text { [10 } 7 \text { 61] }$
B) $\left[ \begin{array} { r r r } 7 & 6 & - 45 \\- 7 & - 4 & - 20 \\- 7 & 4 & - 10\end{array} \right]$
C) not possible
D) $\left[ \begin{array} { r } 10 \\7 \\61\end{array} \right]$