新prep-75

xiaoyao0000

In the year following an eight-cent increase in the federal tax on a pack of cigarettes, sales of cigarettes fell ten percent.In contrast, in the year prior to the tax increase, sales had fallen one percent.The volume of cigarette sales is therefore strongly related to the after-tax price of a pack of cigarettes.

Which of the following, if true, would most strengthen the argument above?

A. During the second year after the tax increase, cigarette sales increased by a significant amount.

B. The information available to consumers on the health risks of smoking remained largely unchanged in the period before and after the tax increase.

C. Most consumers were unaware that the tax on cigarettes was going to increase.

D. During the year following the cigarette tax increase, many consumers had less income, in inflation-adjusted dollars, than they had had in the previous year.

E. During the year after the tax increase, there was a greater variety of cigarettes on the market than there had been during the previous year.
答案是B，但是D为什么不对呢？求助~~

sdcar2010

D) does not have anything to do with the conclusion: The volume of cigarette sales is therefore strongly related to the after-tax price of a pack of cigarettes.

If anything, D) simply points out that those who are addicted to smoking have to spend a bigger share of their income on buying cigarettes.

xiaoyao0000

thanks

xiaoyao0000

这道题，请问能麻烦您解释一下，怎样的逻辑推出的B呢

camelo777

题目的结论是因为tax涨了，所以香烟的sall降了。问支持。

B选项排除了一个他因，因为如果在tax涨的同一时期，人们得到了更对关于香烟对健康危害的资料的话，那么他们就有可能是为了自己的健康而不去买香烟，而不是因为tax的因素。

B排除了他因所以支持，说没有别的原因了，那就是tax影响了香烟的销量。

小紅花

D) does not have anything to do with the conclusion: The volume of cigarette sales is therefore strongly related to the after-tax price of a pack of cigarettes.

If anything, D) simply points out that those who are addicted to smoking have to spend a bigger share of their income on buying cigarettes.

-- by 会员 sdcar2010 (2011/6/9 1:07:56)

你好~我還是想問一下：
1）我开始不选B，是因为觉得它逃避问题。。。=..=~我觉得人家说什么 你干嘛不正面回答，干嘛要迂回~（所以排除他因在support里是都可以用的嘛？~）
2）那D可不可以理解成，就是就算他们没以前有钱了，也不一定说明会买烟买的少（因为说成瘾的，这样举极端的例子会不会有点太挑剔？）

Ray啊Ray

既然在结论-->论据的文章里面他因削弱是削弱题的思路，那么排除他因削弱就是加强的一个思路~
D选项个人认为似乎不能说明任何问题，因为消费者在这一年不知道下一年香烟税提高和在下一年购买香烟数量的减少，似乎说明不了香烟税对香烟销量的影响极大，即使可以的话，个人认为逻辑链条会过长~