Solve the System of Equations $$\begin{array}{l}-3 x+y+6 z=-7 \\7 x+3 y+4 z=-14\end{array}$$

Multiple Choice

Solve the system of equations. Let z be the parameter.
- $$\begin{array}{l}-3 x+y+6 z=-7 \\7 x+3 y+4 z=-14\end{array}$$

A) $(7+14 z,-91+7 z, z)$
B) $\left(\frac{7}{16}+\frac{7}{8} z,-\frac{91}{16}-\frac{27}{8} z, z\right)$
C) $\left(\frac{7}{16}+\frac{7}{8} z,-7+6 z, z\right)$
D) $\left(\frac{7}{16}+\frac{7}{8} z,-7-6 z, z\right\}$