Solve the System by Back Substitution $x+4 y+4 z=11$ $3 y+5 z=17$

Multiple Choice

Solve the system by back substitution.
- $x+4 y+4 z=11$
$3 y+5 z=17$
$2 z=8$

A) No solution
B) $(-6,-1,4)$
C) $(-1,4,-1)$
D) $(-1,-1,4)$