NO.PZ2023010401000038
问题如下：
Companies most likely have a well-defined supply function when the market structure is:
选项：
A.oligopoly.
B.perfect competition.
C.monopolistic competition.
解释：
A company in a perfectly competitive market must accept whatever price the market dictates. The marginal cost schedule of a company in a perfectly competitive market determines its supply function.
中文解析：
在完全竞争市场中，公司必须接受市场决定的任何价格。完全竞争市场中企业的边际成本表决定了企业的供给函数。
请问答案C为什么不对？
