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.
- $\left[ \begin{array} { r r r | r } 1 & 0 & - 7 & 4 \\ 0 & 1 & 6 & 1 \\ 0 & 0 & 0 & 1 \end{array} \right]$

A) $\{ ( - 7,6,0 ) \}$
B) $\{ ( 11 , - 5,1 ) \}$
C) $\{ ( 4,1,0 ) \}$
D) { }