Write the Matrix in Reduced Row-Echelon Form $\left[ \begin{array} { c c c c } 7 & - 5 & 4 & 1 \\- 7 & 3 & - 2 & 21 \\8 & 2 & 3 & - 53\end{array} \right]$

Multiple Choice

Write the matrix in reduced row-echelon form. $\left[ \begin{array} { c c c c } 7 & - 5 & 4 & 1 \\- 7 & 3 & - 2 & 21 \\8 & 2 & 3 & - 53\end{array} \right]$

A) $\left[ \begin{array} { l l l l } 1 & 0 & 0 & 0 \\0 & 1 & 0 & 0 \\0 & 0 & 1 & 0\end{array} \right]$
B) $\left[ \begin{array} { c c c c } 1 & 0 & 1 & - 7 \\0 & 1 & 0 & 5 \\0 & 0 & 1 & - 6\end{array} \right]$
C) $\left[ \begin{array} { c c c c } 1 & 0 & 0 & - 8 \\0 & 1 & 0 & - 5 \\0 & 0 & 1 & 5\end{array} \right]$
D) $\left[ \begin{array} { c c c c } 1 & 0 & 0 & - 7 \\0 & 1 & 0 & - 6 \\0 & 0 & 1 & 5\end{array} \right]$
E) $\left[ \begin{array} { l l l l } 1 & 0 & 0 & 1 \\0 & 1 & 0 & 1 \\0 & 0 & 1 & 1\end{array} \right]$