Determine the Solution Set for the System Represented by the Augmented

Multiple Choice

Determine the solution set for the system represented by the augmented matrix.
- $\left[ \begin{array} { r r r | r } 1 & 0 & - 4 & 7 \\ 0 & 1 & 8 & - 7 \\ 0 & 0 & 0 & 0 \end{array} \right]$

A) $\{ ( 7 - 4 z , - 7 + 8 z , z ) \mid z$ is any real number $\}$
B) { }
C) $\{ ( 7 , - 7,0 ) \}$
D) $\{ ( 7 + 4 z , - 7 - 8 z , z ) \mid z$ is any real number $\}$