Solve the System $$\left\{ \begin{array} { l } x - y + z = - 11 \\x + y + z = - 1 \\x + y - z = 1\end{array} \right.$$

Multiple Choice

Solve the system.
- $$\left\{ \begin{array} { l } x - y + z = - 11 \\x + y + z = - 1 \\x + y - z = 1\end{array} \right.$$

A) $( - 1 , - 5,5 )$
B) $( - 5,5 , - 1 )$
C) $( - 5 , - 1,5 )$
D) $\varnothing$