Perform the Elementary Row Operation on the Given Matrix $$- \frac { 1 } { 2 } R _ { 2 } \rightarrow R _ { 2 }$$

Multiple Choice

Perform the elementary row operation on the given matrix.
- $$- \frac { 1 } { 2 } R _ { 2 } \rightarrow R _ { 2 }$$
$$\left[ \begin{array} { r r | r } 9 & 11 & 1 \\16 & 32 & 20\end{array} \right]$$

A) $\left[\begin{array}{rr|r}9 & 11 & 1 \\ -8 & -16 & -10\end{array}\right]$

B) $\left[\begin{array}{ll|r}9 & 11 & 1 \\ 8 & 16 & 10\end{array}\right]$

C) $\left[\begin{array}{rr|r}18 & 22 & 2 \\ 16 & 32 & 20\end{array}\right]$

D) $\left[\begin{array}{rr|r}9 & 11 & 1 \\ 32 & 64 & 40\end{array}\right]$