Find the Solution or Solutions, If Any Exist, to the System

Multiple Choice

Find the solution or solutions, if any exist, to the system.
- $$\left\{ \begin{array} { l } 7 x + 7 y + z = 1 \\x + 8 y + 8 z = 8 \\9 x + y + 9 z = 9\end{array} \right.$$

A) $x = 0 , y = 1 , z = 0$
B) $x = - 1 , y = 1 , z = 1$
C) $x = 1 , y = - 1 , z = 1$
D) $x = 0 , y = 0 , z = 1$