Perform the Matrix Row Operation (Or Operations)and Write the New

Multiple Choice

Perform the matrix row operation (or operations) and write the new matrix.
- $\left[ \begin{array} { r r r | r } 36 & 30 & 33 & - 36 \\ 1 & 13 & - 3 & 0 \\ 2 & - 7 & 4 & 21 \end{array} \right] \frac { 1 } { 3 } \mathrm { R } _ { 1 }$

A)
$\left[ \begin{array} { c c r | r } 12 & 10 & 11 & - 12 \\ 1 & 13 & - 3 & 0 \\ 2 & - 7 & 4 & 21 \end{array} \right]$
B)
$\left[ \begin{array} { r r r | r } 36 & 30 & 33 & - 36 \\ \frac { 1 } { 3 } & \frac { 13 } { 3 } & - 1 & 0 \\ 2 & - 7 & 4 & 21 \end{array} \right]$
C)
$\left[ \begin{array} { r r r | r } 12 & 10 & 11 & - 36 \\ 1 & 13 & - 3 & 0 \\ 2 & - 7 & 4 & 21 \end{array} \right]$
D)
$$\left[ \begin{array} { r r r | r } 12 & 10 & 11 & - 12 \\\frac { 1 } { 3 } & \frac { 13 } { 3 } & - 1 & 0 \\\frac { 2 } { 3 } & - \frac { 7 } { 3 } & \frac { 4 } { 3 } & 7\end{array} \right]$$