[求助]请教两道道prep逻辑题，万分感谢

1.       一道逻辑题

 In Kravonia, the average salary for jobs requiring a college degree has always been higher than the average salary for jobs that do not require a degree. Over the last few years, the number of Kravonians enrolled in college has been growing steadily. Therefore, the number of Kravonians entering the job market who have at least the qualification of a college degree will eventually be significantly higher than it has been over the last few years.

问weaken

A.     Kravonians with more than one college degree earn little more, on average, than do Kravonians with only one college degree.

B.      The average number of years Kravonians college students remain enrolled before completing a degree has been increasing over the past several years.

C.      Despite the increase in the number of Kravonians attending college, the percentage of the population attending college is lower in Kravonians than in most other countries.

D.     In recent years, employers have been requiring college degrees for workers in jobs that were previously successfully by Kravonians who did not have college degrees.

E.      For many years ,employers in Kravonians have had difficulty finding enough college graduates to fill the high-paying jobs that were available.

答案选B，
            可我怎么觉得B是加强呢/

2.       一道逻辑题

Kernland imposes a high tariff on the export of unprocessed cashew nuts in order to ensure that the nuts are sold to domestic processing plants. If the tariff were lifted and unprocessed cashews were sold at world market prices, more farmers could profit by growing cashews. However, since all the processing plants in urban areas, removing the tariff would seriously hamper the government’s effort to reduce urban unemployment over the next five years.

问weaken

A.     Some of the by-products of processing cashews are used for manufacturing paints and plastics.

B.      Other countries in which cashews are processed subsidize their processing plants.

C.      More people in Kernland are engaged in farming cashews than in processing them.

D.     Buying unprocessed cashews at lower than the world market prices enables cashew processors in Kernland to sell processed nuts at competitive prices.

E.      A lack of profitable crops is driving an increasing number of small farmers in Kernland off their land and into the cities.

答案选的E，可我认为E还是在加强啊。城市的人口多了的话，失业率不是应该上升的吗？

谢谢各位G友的解答，
            小妹在此感激不尽。

第一题，题目的意思是说。进入大学的人变多了，所以进入工作的那些拥有至少一个学位的人也变多了。B的意思是再完成一个学位前，继续在进入大学也多了。就是说，那些人拥有一个学位的不去工作，继续读书。那么进入工作的人就少了。WEAKEN.

第二题，

答案选的E，可我认为E还是在加强啊。城市的人口多了的话，失业率不是应该上升的吗？ 是这么理解的。这个就WEAKEN了原文的reduce urban unemployment 。说明这个措施不能减少城市失业

答案选的E，可我认为E还是在加强啊。城市的人口多了的话，失业率不是应该上升的吗？ 是这么理解的。这个就WEAKEN了原文的reduce urban unemployment 。说明这个措施不能减少城市失业

谢谢qbfnigel的解答，我明白喽！！