急求取消关税-农民-城市失业率那道题讨论链接

以前看到过，一直没想明白，今天作练习又碰到了，请教大家是否知道以前的讨论链接？

附上原题，请理解的朋友指点一下。谢过了！

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?

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

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

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

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

5. 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

这题很明显啊。是他因削弱。

题目说政府取消关税－农民的腰果都卖往国外－工厂失业增加

E说农民由于种田不赚钱了因此都不种田了，那么加工腰果的厂就没东西加工了，肯定要失业。

请问您的问题是什么呢？

哦  谢谢拉！