Find the Indicated Matrix $\mathrm { A } = \left[ \begin{array} { c c } - 1 & - 1 \\ - 8 & - 2 \\ 8 & - 1 \end{array} \right]$

Multiple Choice

Find the indicated matrix.
-Let $\mathrm { A } = \left[ \begin{array} { c c } - 1 & - 1 \\ - 8 & - 2 \\ 8 & - 1 \end{array} \right]$ and $\mathrm { B } = \left[ \begin{array} { r r } - 4 & 8 \\ - 4 & 1 \\ - 1 & - 1 \end{array} \right]$ . Find $\mathrm { A } + \mathrm { B }$ .

A) $\left[ \begin{array} { r r } - 5 & 7 \\ - 12 & - 1 \\ 7 & - 2 \end{array} \right]$
B) $\left[ \begin{array} { r r } - 5 & - 2 \\ - 12 & - 1 \\ 7 & - 2 \end{array} \right]$
C) $\left[ \begin{array} { r r } 3 & - 9 \\ - 4 & - 3 \\ 9 & - 9 \end{array} \right]$
D) $\left[ \begin{array} { r r } - 5 & 7 \\ 12 & - 2 \\ 7 & 2 \end{array} \right]$