Find the solution or solutions, if any exist, to the system.
A. x = -2, y = 4, z = 0, w = 0
B. inconsistent system, no solution
C. infinitely many solutions of the form x = - 3z - 2, y = 4z + 4, z = 0, w = w
D. infinitely many solutions of the form x = 3z - 2, y = -4z + 4, z = z, w = 0
Answer: D
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