Definition: You are given a question on high school microeconomics. You are also given 4 answer options (associated with "A", "B", "C", "D"), out of which only one is correct. You need to answer the question by selecting the correct option. You should only answer with the choice letter, not the whole answer.
Input: Monopolistic competition is said to be productively inefficient because
(A)the long-run price is above minimum average total cost. (B)long-run profits are positive. (C)firms engage in collusive behavior. (D)there exist no barriers to entry.

A