Use the Gauss-Jordan Method to Solve the System of Equations $7 x-y-7 z=4$

Multiple Choice

Use the Gauss-Jordan method to solve the system of equations.
- $7 x-y-7 z=4$
$-7 x+3 z=-39$
$7 y+z=29$

A) $(-9,3,18)$
B) No solution
C) $(9,3,8)$
D) $(9,8,3)$