Solve the System of Equations $$\begin{aligned}x + y + z & = 1 \\x - y + 5 z & = - 21 \\2 x + 2 y + 2 z & = 3\end{aligned}$$

Multiple Choice

Solve the system of equations.
- $$\begin{aligned}x + y + z & = 1 \\x - y + 5 z & = - 21 \\2 x + 2 y + 2 z & = 3\end{aligned}$$

A) $\{ ( 2,3 , - 4 ) \}$
B) $\{ ( - 4,2,3 ) \}$
C) $\{ ( - 4,3,2 ) \}$
D) $\varnothing$