$\left\{ \begin{array} { l } 2 x - 5 z + w = - 1 \\- x + 2 y + z - 2 w = 1 \\4 x - y + 5 w = - 2 \\y - 2 z - w = 0\end{array} \right.$

Multiple Choice

$\left\{ \begin{array} { l } 2 x - 5 z + w = - 1 \\- x + 2 y + z - 2 w = 1 \\4 x - y + 5 w = - 2 \\y - 2 z - w = 0\end{array} \right.$

A) x=-2, y=4, z=3, w=-5
B) x=4, y=-2, z=-7, w=-4
C) x=3, y=0, z=-1, w=0
D) x=4, y=-2, z=1, w=-4