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) ? $( - 10,2,4 )$