Use Back-Substitution to Solve the System of Linear Equations $\left\{ \begin{array} { c c } 2 x + y - 3 z & = 10 \\y + z & = 6 \\z & = 4\end{array} \right.$

Multiple Choice

Use back-substitution to solve the system of linear equations. $\left\{ \begin{array} { c c } 2 x + y - 3 z & = 10 \\y + z & = 6 \\z & = 4\end{array} \right.$

A) $( 10,1,4 )$
B) $( - 10,2 , - 4 )$
C) $( 10,2 , - 4 )$
D) $( 10,2,4 )$
E) $( - 10,2,4 )$