一道GWD逻辑 求大牛指点思路！

naryi

GWD7-Q37:

Escalating worldwide demand for corn has led to a sharp increase in the market price of corn, and corn prices are likely to remain high.  Corn is extensive used as feed for livestock, and because profit margins are tight in the livestock business, many farmers are expected to leave the business.  With fewer suppliers, meat prices will surely rise.  Nonetheless, observers expect an immediate short-term decrease in meat prices.

Which of the following, if true, most helps to justify the observers’ expectation?

A. The increase in corn prices is due more to a decline in the supply of corn than to a growth in demand for it.

B. Generally, farmers who are squeezed out of the livestock business send their livestock to market much earlier than they otherwise would.

C. Some people who ate meat regularly in the past are converting to diets that include little or no meat.

D. As meat prices rise, the number of livestock producers is likely to rise again.

E. Livestock producers who stay in the business will start using feed other than corn more extensively than they did in the past.

答案是B
corn的价格上升，它用于喂牲畜，牲畜产业的利润很低，农民想离开。因为供应少了，肉的价格会上升。但价格反而有短期的下降。这题思路是什么啊？请NN解释下C和E为什么不对呢？

谢谢啦

weimeimm

不是牛牛但是愿意说说自己的理解，先看正确答案B，justify的是premise，premise说With fewer suppliers, meat prices will surely rise. B选项说在farmer squeezed 之前就已经send livestock to market，即使supplier数量减少但供应量不变甚至增多，price不会rise。结论中有一个词是immediate short-term，可以解释E选项不正确，E选项说留下的producer will start，也就是短期内并不会导致一个immediate的decrease。C选项是从消费者角度说的，与原文作者观点无关。

naryi

weimeimm 发表于 2013-5-3 12:42
不是牛牛但是愿意说说自己的理解，先看正确答案B，justify的是premise，premise说With fewer suppliers, me ...

嗯明白了 谢谢你哈