Perform the Indicated Row Operations on the Matrix $$\left[ \begin{array} { c c c } 1 & - 1 & 9 \\- 3 & 4 & 4 \\6 & - 8 & - 8\end{array} \right]$$

Multiple Choice

Perform the indicated row operations on the matrix. Show the final result.
$$\left[ \begin{array} { c c c } 1 & - 1 & 9 \\- 3 & 4 & 4 \\6 & - 8 & - 8\end{array} \right]$$
Add 3 times $R _ { 1 }$ to $R _ { 2 }$ .
Add $- 6$ times $R _ { 1 }$ to $R _ { 3 }$ .

A) $\left[ \begin{array} { c c c } 6 & - 14 & - 224 \\ - 3 & 4 & 4 \\ 6 & - 8 & - 8 \end{array} \right]$
B) $\left[ \begin{array} { c c c } 1 & - 1 & 9 \\ 0 & 1 & 13 \\ 0 & - 9 & 1 \end{array} \right]$
C) $\left[ \begin{array} { c c c } 1 & - 1 & 9 \\ 0 & 1 & 31 \\ 0 & - 2 & - 62 \end{array} \right]$
D) $\left[ \begin{array} { c c c } 1 & - 1 & 9 \\ - 8 & 11 & 21 \\ - 35 & 47 & 57 \end{array} \right]$
Е) $\left[ \begin{array} { c c c } 1 & - 1 & 9 \\ 0 & 10 & - 50 \\ 0 & - 11 & - 11 \end{array} \right]$