Solve the System $$\left\{ \begin{array} { r r } 3 x - 3 y + 6 z = & - 30 \\- 15 x + 15 y - 30 z = & 150 \\12 x - 12 y + 24 z = & - 120\end{array} \right.$$

Multiple Choice

Solve the system. If there is no solution or if the system's equations are dependent, so state.
- $$\left\{ \begin{array} { r r } 3 x - 3 y + 6 z = & - 30 \\- 15 x + 15 y - 30 z = & 150 \\12 x - 12 y + 24 z = & - 120\end{array} \right.$$

A) $\{ ( 4 , - 9 , - 4 ) \}$
B) $\{ ( 4 , - 4 , - 9 ) \}$
C) infinitely many solutions; dependent equations
D) no solution or $\varnothing$