Solve the system of equations using Cramer's Rule if it is applicable. If Cramer's Rule is not applicable, say so.
A. x = 8, y = 4, z = 2; (8, 4, 2)
B. x = 9, y = 2, z = 2; (9, 2, 2)
C. x = 4, y = 2, z = 4; (4, 2, 4)
D. x = 8, y = -4, z = -2; (8, -4, -2)
Answer: A
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