Determine Which One of the Ordered Triples Below Is a Solution

Multiple Choice

Determine which one of the ordered triples below is a solution of the given system of equations. $\left\{ \begin{array} { l } 6 x + 3 y + 3 z = - 81 \\6 x - y - z = - 21 \\5 x - 5 y + 5 z = - 25\end{array} \right.$

A) (9, 6, -51)
B) (-6, -8, -7)
C) (-8, 7, 6)
D) (9, 6, -7)
E) (-7, -8, -6)