知道这里的nn多，我想在这里请教道逻辑题

Jasmine10

Kernlandimposes a high tariff on the export of unprocessed cashew nuts in order toensure that the nuts are sold to domestic processing plants. If the tariff werelifted and unprocessed cashew were sold at world market prices, more farmers couldprofit by growing cashews. However, since all the processing plants are inurban areas, removing the tariff would seriously hamper the government‘s effortto reduce urban unemployment over the next five years.

Whichof the following, if true, most seriously weakens the argument?

A.   Some of the by-products of processing cashews are used formanufacturing plants and plastics

B.   Other countries in which cashews are processed subsidize theirprocessing plants

C.   More people in kernland are engaged in farming cashews than inprocessing them

D.  Buying unprocessed cashews at lower than world market prices enablescashew processors in kernland to sell processed nuts at competitive prices

E.   A lack of profitable crops is driving an increasing number of smallfarmers in kernland off their land and into the cities. (反之，如果关税过高，很多农民认为种植腰果无利可图，就会去城市寻求发展，和城镇人口竞争工作。那么城镇失业率会变更高。ps:这是我自己的理解，不知道对不对，求帮助)

jackraywen

你的理解是对的。

Jasmine10

恩～谢谢：）