关于类比加强的选项的问题，求NN指导

搜了CD没有搜到类似问题，求NN指导，很迷惑

A new commercial radio station in Greenfield plans to play songs that were popular hits fifteen to twenty-five years ago. It hopes in this way to attract an audience made up mainly of people between thirty-five and forty-five years old and thereby to have a strong market appeal to advertisers.

Each of the following, if true, strengthens the prospects that the radio station's plan will succeed EXCEPT：

A People tend to remain very fond of the music that they heard when they were in their teens and early twenties.  

B In a number of cities demographically similar to Greenfield, radio stations that play recordings of popular music from fifteen to twenty-five years ago have succeeded commercially.  

C People in the thirty-five- to forty-five-year-old age group are more likely to listen to the radio for news than for music.  

D The thirty-five- to forty-five-year-old age group is one in which people tend to have comparatively high levels of income and are involved in making household purchases.

E Among the few radio stations in the Greenfield area, there is none that plays music from this particular period for more than a few hours per week.

OA：C     也就是说B选项是可以加强的，这是一个通过类比来加强的选项。

但是另一道题却不选类比的选项来加强，

Last year a global disturbance of weather patterns disrupted harvests in many of the world’s important agricultural areas. Worldwide production of soybeans, an important source of protein for people and livestock alike, was not adversely affected, however. Indeed, last year’s soybean crop was actually slightly larger than average. Nevertheless, the weather phenomenon is probably responsible for a recent increase in the world price of soybeans.

Which of the following, if true, provides the strongest justification for the attribution of the increase in soybean prices to the weather phenomenon?

A, Last year’s harvest of anchovies, which provide an important protein source for livestock, was disrupted by the effects of the weather phenomenon.

B, Most countries that produce soybeans for export had above-average harvests of a number of food crops other than soybeans last year.

C, The world price of soybeans also rose several years ago, immediately after an earlier occurrence of a similar global weather disturbance.

D, Heavy rains attributable to the weather phenomenon improved grazing pastures last year, allowing farmers in many parts of the world to reduce their dependence on supplemental feed.

E, Prior to last year, soybean prices had been falling for several years.

OA： A    我想知道不选C的原因