Use the Indicated Row Operation to Change the Matrix $R_{2}$

Multiple Choice

Use the indicated row operation to change the matrix.
-Replace $R_{2}$ by $\frac{1}{3} R_{1}+\frac{1}{2} R_{2}$ .
$\left[\begin{array}{rr|r}3 & 0 & 15 \\ -2 & 4 & 12\end{array}\right]$

A) $\left[\begin{array}{ll|l}3 & 0 & 15 \\ 0 & 2 & 11\end{array}\right]$
B) $\left[\begin{array}{rr|r}3 & 0 & 15 \\ -1 & 2 & 6\end{array}\right]$
C) $\left[\begin{array}{ll|l}3 & 0 & 15 \\ 1 & 4 & 27\end{array}\right]$
D) $\left[\begin{array}{ll|l}3 & 0 & 15 \\ 0 & 0 & 11\end{array}\right]$