GMAT 逻辑分析题 (23)

sdcar2010

Nutritionist: A recent nutrition study confirms that nutritious breakfasts increase GMAT test taker’s final score. For one month, test takers in Group A received free nutritious breakfasts every day before their intense study, while test takers in Group B did not. At the end of the month, both groups took the same GMAT test. The average score of Group A’s test takers increased, while that of Group B’s test takers did not.

Which one of the following, if true, most strengthens the argument?

A) During the month before the study, test takers at Group A and Group B had similar average GMAT scores.
B) Test takers in the study from Group A and Group B started studying at the same time of day at the same location.
C) Few test takers in Group B consumed equally nutritious breakfasts during the month of the study.
D) Test takers from Group A took fewer days off per person during the month of the study than did test takers from Group B.
E) Test takers in Group A visited www.chasedream.com more often during the month of the study than did test takers from Group B.

colasama

A)？
原文只说提高，没说对比的基础一样
A填补了这个空缺

sdcar2010

A)？
原文只说提高，没说对比的基础一样
A填补了这个空缺

-- by 会员 colasama (2010/12/7 13:29:18)

A is an attractive answer since it seems to make the battlefield even and make sure the fight fair.  However, a similar starting point is not required for the argument.  For example, if Group A increased from 700 to 730 while Group B remained at 620, the argument still holds.  An increase is an increase no matter how high or how low the starting point. So answer A has no overall effect on the argument since we are not comparing Group A with Group B. Instead we are comparing changes made within Group A  and those within Group B.  Notice the difference between these two scenarios?

Politician

Vote for C ? Though not sure.
Both A&B look attractive, in that they instate that nothing else would likely to contribute to GroupB's performance.
C stands out for indicating that the breakfast is precisely the reason why B did a better job.

sdcar2010

LS is right!

C is the correct answer.  If members of Group B also ate nutritious breakfast, the argument falls apart since members of Group B have no improvemnet in their GMAT scores.

colasama

看错题了...看漏了free...

以为B就一定不吃营养早餐...

知寻

这是lz自己编的题？

缨络

很喜感的题哦 谢谢楼主 期待更多
我选C

hellomatt

我选B

B排除了一些其他可能造成备考效果差异的因素。
C没有帮助，甚至反而削弱了营养早餐的作用。（一些B组的成员也吃了营养早餐，结果成绩还是比A组差，不是说明营养早餐没有用吗？）

sdcar2010

我选B

B排除了一些其他可能造成备考效果差异的因素。
C没有帮助，甚至反而削弱了营养早餐的作用。（一些B组的成员也吃了营养早餐，结果成绩还是比A组差，不是说明营养早餐没有用吗？）

-- by 会员 hellomatt (2010/12/11 23:11:06)

You did not understand your own statement. C simply removed the possibility of B ate breakfast.  Thus C removes one scenario of weakening the hypothesis and makes the argument more likely.