问题如下：
In a perfectly competitive market, If one supplier reduces its output by 5%, then:
选项：
A.his total revenue will reduce by 5%.
B.his average revenue will reduce by 5%.
C.his total revenue will reduce by less than 5%.
解释：
A is correct.
The unit sales change of a single supplier in a perfectly competitive market has no influence on the market price. Thus, a reduce of 5% in units sales will reduce the revenue at 5% as well.
考点：完全竞争市场下厂商的总收入
解析：在完全竞争的市场条件下，P=MR
虽然题目中的厂商把单位售价提高5%，但是农场品市场是完全竞争市场，厂家只是价格的被动接受者。到最后改厂商只能以原价格卖出产品。但是产量增加了5%,所以总收入增加了5%。B,C选项说法都不对。
请问一下这个中文的解说是不是有什么问题。。bc没有说增加呀而且题目哪里提到的单位售价增加5%呢
