依据《中华人民共和国价格法》，下列属于经营者正当价格行为的是()

A．相互串通，操纵市场价格，损害其他经营者或消费者的合法权益

B．为了排挤竞争对手或者独占市场，以低于成本的价格倾销

C．降价处理鲜活商品、季节性商品、积压商品

D．捏造、散布涨价信息，哄抬价格，推动商品价格过高上涨

E．提供相同商品或者服务，对具有同等交易条件的其他经营者实行价格歧视

David: Since attempting to preserve every species that is currently endangered is prohibitively expensive, the endangered species whose value to humanity is the greatest should be accorded the highest priority for preservation.
Karen: Such a policy would be unsound because it is impossible to predict the future value of a species, nor is it always possible to assess the present value of species whose contributions to humanity, though significant, are indirect.
Which of the following is the main point of Karen’s reply to David

A．Although it would be desirable to preserve all endangered species, doing so is not economically feasible.

B．Even if the value to humanity of a given species is known, that value should not be a factor in any decision on whether to expend effort to preserve that species.

C．Species whose contributions to humanity are direct should have a higher priority for preservation efforts than species whose contributions to humanity are only indirect.

D．Since the methods for deciding which species have the most value to humanity are imperfect, informed decisions cannot be made on the basis of the assessment of such value.

E．(E) The preservation of endangered species whose value to humanity can be reliably predicted is more important than the preservation of species whose value for humanity is unpredictable.