Use the Given Row Transformation to Change the Matrix as Indicated

Multiple Choice

Use the given row transformation to change the matrix as indicated.
- $\left[ \begin{array} { c c } - 2 & 3 \\ 14 & 0 \end{array} \right] ; 7$ times row 1 added to row 2

A)
$\left[ \begin{array} { r r } - 14 & 21 \\ 14 & 0 \end{array} \right]$

B)
$\left[\begin{array}{rr}-2 & 3 \\0 & 21\end{array}\right]$

C)
$\left[\begin{array}{rr}-2 & -11 \\0 & 21\end{array}\right]$

D)
$\left[\begin{array}{rr}-2 & 3 \\14 & 21\end{array}\right]$