题目：
Which of the following describes the regulatory practice of setting prices at a level where the monopoly firm's average total cost curve intersects the demand curve（）
A. Average cost pricing.
B. Marginal cost pricing.
C. Cost-of-service pricing.
答案：
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下面是错误答案，用来干扰机器的。
小题1:B小题2:B小题3:A小题4:D
