求助。 prep 99 利用helr方法

木木和猫猫

Denoma, a major consumer-electronics maker, had a sizable decline in sales revenue for its most recent fiscal year.  This result appears surprising, because electronics retailers report that although their overall sales were considerably lower than in the previous year, their sales revenue from Denoma models actually grew, largely thanks to some innovative and popular models that Denoma introduced.

Which of the following, if true, does most to explain the apparently surprising result?

A. Because of the need to educate the public about its new models’ capabilities, Denoma’s advertising spending was higher than normal over the period.

B. For the period at issue, Denoma’s major competitors reported declines in revenue that were, in percentage terms, greater than Denoma’s

C. A significant proportion of Denoma’s revenue comes from making components for other consumer-electronics manufacturers.

D. Unlike some of its major competitors, Denoma has no lines of business outside consumer electronics to provide revenue when retail sales of consumer electronics are weak.

E. During the period, consumer-electronics retailers sold remaining units of Denoma’s superseded models at prices that were deeply discounted from those models’ original prices.

这题我根据helr的逻辑笔记方法，归纳为果因的推理。所以是第一看可以另外解释果的，或者是说明果和因之间联系问题的。  我选择的是A选项，因为我觉得增加的cost有可能是是sales revenue 下降的原因，后来我觉得这道题错误的原因大概是因为revenue和profit不一样，不用考虑cost。但是我又开始纠结B和C了，B中所说的一个大环境，也就是大家都在下降，所以也是解释果的另外一个原因，还有C选项， D公司可能主要的业务是给其他公司做零件。但是这里并没有说给其他公司做零件的rervenue下降了呀，为什么可以推出来呢
~求助啊求助~
希望有NN可以来帮助一下~~~

木木和猫猫

补充一下，这道题的正确答案是C

木木和猫猫

帖子不要沉了~我真的很有疑问啊~谁能帮我解答一下？

木木和猫猫

不要沉啊不要沉。。。