gwd30-15

请教一道题

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 are in urban areas, removing the tariff would seriously hamper the government’s effort to reduce urban unemployment over the next five years.

Which of the following, if true, most seriously weakens the argument?

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 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.

答案是E，但是不理解，期待答复。。。。。

俺的思路：

取消关税会有利于农民，但会造成城市失业率上升，

削弱方向：（1）取消关税不会造成城市失业率上升

                 （2）不取消关税才会造成城市失业率上升—因为农民没有收益都跑到城里来了。

答案选了（2）E

关键在于urban这个词

我也是觉得关税提高会有利于农民啊

楼上"关税升高=>农民lacks profitable crops"是怎么推的?