Find the Indicated Matrix $A = \left[ \begin{array} { r r r } 6 & 4 & 1 \\ 12 & 2 & - 1 \\ - 4 & 2 & 3 \end{array} \right]$

Multiple Choice

Find the indicated matrix.
-Let $A = \left[ \begin{array} { r r r } 6 & 4 & 1 \\ 12 & 2 & - 1 \\ - 4 & 2 & 3 \end{array} \right]$ and $B = \left[ \begin{array} { r r r } 10 & - 4 & 1 \\ - 4 & 0 & 2 \\ 3 & 3 & - 2 \end{array} \right]$ . Find $A - B$ .

A) $\left[ \begin{array} { r r r } - 4 & - 8 & 0 \\ 16 & 2 & - 3 \\ - 7 & 1 & 5 \end{array} \right]$
B) $\left[ \begin{array} { r r r } - 4 & 0 & 0 \\ 16 & 2 & - 3 \\ 1 & - 1 & 1 \end{array} \right]$
C) $\left[ \begin{array} { r r r } 16 & 0 & 2 \\ 8 & 2 & 1 \\ - 1 & 5 & 1 \end{array} \right]$
D) $\left[ \begin{array} { r r r } - 4 & 8 & 0 \\ 16 & 2 & - 3 \\ - 7 & - 1 & 5 \end{array} \right]$