NO.PZ2023010401000039
问题如下：
If companies earn economic profits in a perfectly competitive market, over the long run the supply curve will most likely:选项：
A.shift to the left. B.shift to the right. C.remain unchanged.解释：
The economic profit will attract new entrants to the market and encourage existing companies to expand capacity.
中文解析
经济利润将吸引新进入者进入市场，并鼓励现有公司扩大产能。
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