Multiply.6z2(7z5 + 7z2 + 7z + 4)

A. 42z10 + 42z4 + 42z + 24
B. 42z7 + 42z4 + 42z3 + 24z2
C. 42z7 + 42z4 + 42z2 + 24
D. 13z4 + 13z + 10


Answer: B

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