Expand. Assume that all variables represent positive real numbers.log5 
A. 5 log5 x + 6 log5 y - log5 4
B. 5 log5 x - 6 log5 y - log5 4
C. (5 log5 x)(6 log5 y) - log5 4
D. 5 log5 x + 6 log5 y + log5 4
Answer: A
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