Perform the Indicated Elementary Row Operations $$\begin{array} { l } ( - 3 ) \mathrm { R } _ { 1 } \\{ \left[ \begin{array} { r r } 5 & 3 \\7 & - 6\end{array} \right] }\end{array}$$

Multiple Choice

Perform the indicated elementary row operations.
- $$\begin{array} { l } ( - 3 ) \mathrm { R } _ { 1 } \\{ \left[ \begin{array} { r r } 5 & 3 \\7 & - 6\end{array} \right] }\end{array}$$

A)
$\left[ \begin{array} { r r } - 15 & - 9 \\ 7 & - 6 \end{array} \right]$
B)
$\left[ \begin{array} { r r } 15 & 9 \\ 7 & - 6 \end{array} \right]$
C)
$\left[ \begin{array} { l l } - 15 & - 9 \\ - 21 & 18 \end{array} \right]$
D)
$\left[ \begin{array} { r r } 5 & 3 \\ - 21 & 18 \end{array} \right]$