Use the Matrix Capabilities of a Graphing Utility to Reduce $$\left\{ \begin{array} { c } x - 7 y - 3 z = 64 \\3 x + 7 y + 2 z = - 92 \\- 2 x + 14 y + 6 z = 64 \\- 8 x + 2 y + 2 z = 42\end{array} \right.$$

Multiple Choice

Use the matrix capabilities of a graphing utility to reduce the augmented matrix corresponding to the system of equations, and solve the system.
$$\left\{ \begin{array} { c } x - 7 y - 3 z = 64 \\3 x + 7 y + 2 z = - 92 \\- 2 x + 14 y + 6 z = 64 \\- 8 x + 2 y + 2 z = 42\end{array} \right.$$

A) $x = - 9 , y = - 7 , z = - 8$
B) $x = 75 , y = 2 , z = - 1$
C) $x = - 9 , y = 7 , z = 8$
D) $x = - 9 , y = - 7 , z = 8$
E) no solution