紧急请教GMAT题

The recent decline in the value of the dollar was triggered by a prediction of slower economic growth in the coming year. But that prediction would not have adversely affected the dollar had it not been for the government's huge budget deficit, which must therefore be decreased to prevent future currency declines.Which of the following, if true, would most seriously weaken the conclusion about how to prevent future currency declines?

（A） The government has made little attempt to reduce the budget deficit.
　　（B） The budget deficit has not caused a slowdown in economic growth.
　　（C） The value of the dollar declined several times in the year prior to the recent prediction of slower economic growth.
　　（D） Before there was a large budget deficit, predictions of slower economic growth frequently caused declines in the dollar's value.
　　（E） When there is a large budget deficit, other events in addition to predictions of slower economic growth sometimes trigger declines in currency value.

答案选第四个，我实在不明白。请各位高手讲解一下！谢谢

我提个建议，大家提问题前先把题目和五个答案自己翻译一下贴在网上，这样别人可以知道你到底是逻辑有问题还是阅读有问题，然后可以给你指出来哪个地方理解错了。没头没脑的就问为什么，5个答案也不知道你困惑哪个答案，为什么困惑。

逻辑往往基于相对较强的阅读功力，很多时候翻译一遍自己忽然就明白了，而且翻的过程对自己的阅读和语法都会有一个很大的提高，不是浪费时间。

二楼你是什么意思呀？

支持2楼的,

其实这道题目根本就是OG10里边的, 如果楼主有心想提问, 也应该先翻翻以前的帖子, 看前人留下的经验,比你自己在这里开个帖子, 然后苦苦等待大家来回答你快多了

还有,即使要发贴, 请注意 发贴的规范, 没头没脑的写个"GMAT题" , 让以后的人怎么来搜索呢? 比如这道题目是 OG10-61,

更何况,楼主这里只是贴了题目, 也没有写出自己的想法, 又让别人怎么来帮你呢?

我在这里贴一下OG10 的解释, 请你看看, 如果还有问题, 那么请针对性的提问

61.

The argument assumes that a particular predict can cause a currency decline only if accompanied by a large budget deficit. Since choice D states that this prediction can cause a currency decline without a large budget deficit, choice D is the best answer.

That a method is not fully implemented does not imply that the method is ineffective. Thus, choice A is inappropriate. Since no slowdown in economic growth is asserted, what might cause such a slowdown is irrelevant. Thus, choice B is inappropriate. Since C supports the claim that a budget deficit is the underlying cause of the currency decline, C is inappropriate. Choice E is inappropriate because it supports the claim that a decrease in the budget deficit is necessary.

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