Identify the Indicated Submatrix $A = \left[ \begin{array} { r r r | r } 0 & 1 & - 4 & - 5 \\ 4 & - 1 & 0 & 7 \\ \hline 2 & 5 & - 7 & 0 \end{array} \right]$

Multiple Choice

Identify the indicated submatrix.
- $A = \left[ \begin{array} { r r r | r } 0 & 1 & - 4 & - 5 \\ 4 & - 1 & 0 & 7 \\ \hline 2 & 5 & - 7 & 0 \end{array} \right]$ . Find $A _ { 12 }$

A) $[ 4 ]$
B) 1
C) $\left[ \begin{array} { l l l } 2 & 5 & - 7 \end{array} \right]$
D) $\left[ \begin{array} { r } - 5 \\ 7 \end{array} \right]$