Find the Indicated Matrix $A = \left[ \begin{array} { r r } - 1 & 0 \\ 3 & 2 \end{array} \right]$

Multiple Choice

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

A) $[ - 2 ]$
B) $\left[ \begin{array} { r r } 0 & 3 \\ 0 & - 1 \end{array} \right]$
C) $\left[ \begin{array} { r r } - 2 & 3 \\ 6 & 3 \end{array} \right]$
D) $\left[ \begin{array} { r r } 0 & - 3 \\ 0 & 1 \end{array} \right]$