PREP一道逻辑题Sales of telephones

lainemai

Salesof telephones have increased dramatically over the last year. In order to takeadvantage of this increase, Mammoth Industries plans to expand production ofits own model of telephone, while continuing its already very extensiveadvertising of this product.

Which of the following, if true,provides most support for the view that Mammoth Industries cannot increase its salesof telephones by adopting the plan outlined above?

A Although it sells all the telephones that it produces,Mammoth Industries' share of all telephone sales has declined over the lastyear.

B Mammoth Industries' average inventory of telephonesawaiting shipment to retailers has declined slightly over the last year.

C Advertising has made the brand name of MammothIndustries' telephones widely known, but few consumers know that MammothIndustries owns this brand.

D Mammoth Industries' telephone is one of three brandsof telephone that have together accounted for the bulk of the last year'sincrease in sales.

E Despite a slight decline in the retail price, sales ofMammoth Industries' telephones have fallen in the last year.

问削弱，我写出的逻辑链是这样的：Premise:电话的销量在去年显著增长

                                   Conclusion:为了在这次增长中获利，M工厂打算对电话产品扩大广告宣传的同时，或者使它自己的                       电话产品增产。

明显的因果模式推理，但是我当时选的是C，当时的逻辑就是，虽然前提说电话的销量在增长，但这只是普遍现象，如果具体到特殊的话可能就零增长或者根本就是销量在下降。然后推理到这个M工厂的product,就是说尽管它广告打得很大，但是很少有人知道M工厂的这个电话牌子，所以就不可能使得销量增长.这样的逻辑链难道不对吗？求大牛解答~