Solve the problem.Suppose the demand for a certain item is given by 
, where p represents the price of the item. Find D'(p), the rate of change of demand with respect to price.
A. D'(p) = -3p + 5
B. D'(p) = -6p + 5
C. D'(p) = -6p2 + 5
D. D'(p) = -3p2 + 5
Answer: B
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