$\begin{aligned} 7 x+7 y+z & =1 \\ x+8 y+8 z & =8 \\ 9 x+y+9 z & =9\end{aligned}$

Multiple Choice

$\begin{aligned} 7 x+7 y+z & =1 \\ x+8 y+8 z & =8 \\ 9 x+y+9 z & =9\end{aligned}$

A) $(1,-1,1)$
B) $(-1,1,1)$
C) $(0,1,0)$
D) $(0,0,1)$