请教og 121

shellsnow

121. Manufacturers sometimes discount the price of a product to retailers for a promotion period when the product is advertised to consumers. Such promotion often results 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. D

(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.

121.

Choice D indicates that during promotions retailers buy much greater quantities of products at discounted prices than they in turn sell to consumers during those promotions. There is, then, much merchandise that retailers sell at their regular price on which the manufacturers, however, do not realize normal profits. Since this loss of normal profits might outweigh the benefits of attracting new consumers during the promotion period, the manufacturers might be better off not holding the promotions. Choice D is, therefore, the best answer.

Attracting consumers’ attention (choice A), noninterference with sales at regular, non-promotional prices (choice B), and attracting and holding customers (choices C and E) are all features of promotions compatible with manufacturers making high profits, so none of these choice is correct.

排除法选出d，可是无法理解ets的解释d对的原因。请大家帮忙解释一下

谢谢