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 = -1, z = 6; (8, -1, 6)
B. x = 1, y = 6, z = 1; (1, 6, 1)
C. x = 7, y = 1, z = 6; (7, 1, 6)
D. x = 7, y = -1, z = -6; (7, -1, -6)
Answer: C
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