求问prep里的一道题

skipp

[size=14.007px]Manufacturers 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.

[size=14.007px]Which of the following, if true, most strongly supports the claim above about the manufacturers' profit?

[size=14.007px](A) The amount of discount generally offered by manufacturers to retailers is carefully calculated to represent the minimum needed to draw consumers' attention to the product.
[size=14.007px](B) For many consumer products the period of advertising discounted prices to consumers is about a week, not sufficiently long for consumers to become used to the sale price.
[size=14.007px](C) For products that are not newly introduced, the purpose of such promotions is to keep the products in the minds of consumers and to attract consumers who are currently using competing products.
[size=14.007px](D) During such a promotion retailers tend to accumulate in their warehouses inventory bought at discount; they then sell much of it later at their regular price.
[size=14.007px](E) If a manufacturer falls to offer such promotions but its competitor offers them, that competitor will tend to attract consumers away from the manufacturer's product.

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[size=14.007px]结论：制造商不做promotion可以获得更多的利润。
[size=14.007px]正确答案是D
[size=14.007px]我一看结论是关于制造商的profit，那么答案一定要跟制造商的利润有关，当时预判是从制造商的销量入手，一看D选项是说零售商的一个strategy,可以提高profit，我觉得当制造商把东西卖给零售商时，他自己的销量和利润就已经固定下来了，零售商想怎么卖，获得多少利润就跟制造商没什么关系了吧。。。我当时就把D当无关选项排除了，结果。。。
[size=14.007px]我看解析，有的人说这个零售商按原价卖，卖的就会少，那么之后从制造商这里拿货就会少一些，所以总的来说profit不会很高。。。感觉联想的有点远啊。。。
[size=14.007px]各位有更好的解释吗？~感谢~~~