Use the Given Row Transformation to Change the Matrix as Indicated

Multiple Choice

Use the given row transformation to change the matrix as indicated.
- $\left[ \begin{array} { l l } 2 & 3 \\ 4 & 7 \end{array} \right] ; - 2$ times row 1 added to row 2

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