Use the Indicated Row Operation to Change the Matrix $\mathrm{R}_{2}$

Use the indicated row operation to change the matrix.
-Replace $\mathrm{R}_{2}$ by $\mathrm{R}_{1}+(-1) \mathrm{R}_{2}$ .
$\left[\begin{array}{rr|r}1 & -3 & 4 \\ 2 & 3 & 1\end{array}\right]$

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

Correct Answer:

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