搜了好久帖子都没有人问，真蛋碎，求高手解答PERP逻辑题！

DUKB24

Manufactures sometimes discount the price of a product to retailers for a promotion period when the product is advertised to consumers。Such promotions often result in a dramatic increase in amount of product sold by the manufacturers to retailers。Nevertheless，the manufacturers could often make more profit by not holding the promotions。
Which of the following，if ture，most strongly supports the claim above about the manufacturer’s profit？

A。The amount of discount generally offered by manufacturers to retailers is carefully calculated to represent the minimum needed to draw consumer's attention to the product
B。For many consumer products the period of advertiseing discounted prices to consumers is about a week，not sufficiently long for consumersto become used to the sale price
C。For products that are not newly introduced，the purpose of such promotion is to keep the products in the minds of consumers and to attract consumers who are using competing products
D.During such a promotion retailers tend to accumulate in their warehouse inventory bought at discount；they then sell much of it later at their regular price
E。If a manufacturer fails to offer such promotions but its competitor offers them，that competitor will tend to attract consumers away from the manufacturer’s product


答案说D算是最正确的答案，我完全看不出，求NN们解答