请问本题考察哪个知识点 economic loss 是指什么呢？是不是隐形成本？
问题如下图：
选项：
A. 
B. 
C. 
解释：
NO.PZ2016010801000039问题如下Whiof the following is least likely the reason of economic loss among the perfecompetitive instry?A.A collusion agreement is ma to lower the current price.B.Priper unit is lower thaverage totcost.C.New entrants increase the totoutput in the market.A collusion agreement is usually ma oligopolistic instry to cheon something. Perfecompetitors are pritakers ancannot ci the priof procts. If priis lower thaverage totcost, there will economic loss. increase in totoutput will crease the priconsumers’ manremains constant but suppliequantity increases.考点完全竞争厂商，合谋。解析合谋是寡头市场的产物，所以A入选。完全竞争对手是价格接受者，不能决定产品的价格。如果价格低于平均总成本，就会有经济损失。总产出的增加将使价格下降，新厂商的进入会瓜分市场利润，压低市场价格，导致新一轮亏损的产生，所以B,C不入选。完全竞争市场，增加产量不是不会影响价格吗？
Priper unit is lower thaverage totcost. New entrants increase the totoutput in the market. A collusion agreement is usually ma oligopolistic instry to cheon something. Perfecompetitors are pritakers ancannot ci the priof procts. If priis lower thaverage totcost, there will economic loss. increase in totoutput will crease the priconsumers’ manremains constant but suppliequantity increases. 考点完全竞争厂商，合谋。 解析 合谋是寡头市场的产物，所以A入选。 完全竞争对手是价格接受者，不能决定产品的价格。如果价格低于平均总成本，就会有经济损失。总产出的增加将使价格下降，新厂商的进入会瓜分市场利润，压低市场价格，导致新一轮亏损的产生，所以B,C不入选。C不是完全竞争市场无论产量怎么变，价格都不变化么，那为什么价格回小于平均总成本
Priper unit is lower thaverage totcost. New entrants increase the totoutput in the market. A collusion agreement is usually ma oligopolistic instry to cheon something. Perfecompetitors are pritakers ancannot ci the priof procts. If priis lower thaverage totcost, there will economic loss. increase in totoutput will crease the priconsumers’ manremains constant but suppliequantity increases. 考点完全竞争厂商，合谋。 解析 合谋是寡头市场的产物，所以A入选。 完全竞争对手是价格接受者，不能决定产品的价格。如果价格低于平均总成本，就会有经济损失。总产出的增加将使价格下降，新厂商的进入会瓜分市场利润，压低市场价格，导致新一轮亏损的产生，所以B,C不入选。完全竞争市场、p应该等于atc吧？不应该小于吧？
C怎么理解，请老师结合曲线帮忙分析下
老师，完全竞争市场不存在价格被拉低吧，大家都是价格对接受者
