作者：英吉
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.
Which of the following, if true, most strongly supports the claim above about the manufacturers' profit?
(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.
(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.
(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.
(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.
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.
题目分析：A说打折幅度是被仔细计算好的来，说的很扯，杀。B说打折时间长短消费者是否适应，显然没提，杀。C说促销新产品是让消费者记住这种新产品，原文说促销的目的是增加销量，这个选项显然不能支持原文。D说促销时零售商经常增加库存，之后在以正常价格卖出去，这个选项反复谈的就是价格和销售之间的关系，和原文信息有关系，留着。E说如果自己不促销而竞争对手促销，自己就会流失大量消费者。怎么读怎么不像支持，杀。
