Select the correct answer.
Which system of equations has a solution of (-2,-2,-2)
A. 3x-y=-8
y-3z=-8
x+y+z=-8
B. x-2y+z=0
2y+9z¹=-20
x-y+z=0
C. x+2y=-6
y+2x=-6
x-y-z=2
D. x+y=0
y-z=-2
x+y-z=-4