B和C可以详细解释一下吗

NO.PZ2023010401000052 问题如下 Whiof the following is the least likely outcome when a monopolist apts first-gree priscrimination because of customers' ffering manelasticities? A.The monopolist shares the totsurplus with consumers. B.The output increases to the point whipriequals the margincost. C.The prifor a marginunit creases to less ththe prifor other units. In a monopoly, perfepriscrimination results in the totsurplus being kept the procer, the monopolist. 每一单位的价格会持续下降，直到与其他单位的价格持平。正确。在价格歧视下，愿意出高价的客户都购买了产品后，企业就会争取把产品卖出只愿意出低价的客户，企业会不断的争取愿意出低价的客户，直到价格跌到一定水平，才会停止争取只愿意出低价的客户的行为。以上是该题老师之前的答复，还是没太看懂问题一该题不是译为边际成本降到低于其他产品的价格吗问题二、不太理解，为什么愿意出高价的客户买了产品后，企业再去争取只愿出低价的客户？没明白，为何不继续高价而只争取低价的客户呢？