For the System $\left\{ \begin{array} { l } 3 x + y + z = 0 \\x - 2 y + 5 z = 14 \\x + y - 5 z = - 12\end{array} \right.$

Multiple Choice

For the system $\left\{ \begin{array} { l } 3 x + y + z = 0 \\x - 2 y + 5 z = 14 \\x + y - 5 z = - 12\end{array} \right.$ , $D _ { x } = 0$ , $D _ { y } = - 56$ , and $D = 28$ . What is the solution of the system?

A) $\left( \frac { 1 } { 2 } , - \frac { 1 } { 2 } , 2 \right)$
B) $( 0,2,2 )$
C) $( 0 , - 2,2 )$
D) none of these