Multiply.-7ab4(4ab7 + 9b4 + 3a)
A. -28a2b11 + 9b4 + 3a
B. -28ab7 - 63b4 - 21a
C. -28a2b11 - 63ab8 - 21a2b4
D. -28a2b11 - 63ab8
Answer: C
Mathematics
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A. 
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