GWD中的一道加强题，求NN解释

寻沫访华

Smithtown
University’s fund-raisers succeeded in getting donations from 80 percent of the potential donors they contacted.This success rate, exceptionally high for university fund-raisers, does not indicate that they were doing a good job.On the contrary, since the people most likely to donate are those who have donated in the past, good fund-raisers constantly try less-likely prospects in an effort to expand the donor base.The high success rate shows insufficient canvassing effort.


Which of the following, if true, provides more support for the argument?



A.Smithtown
University’s fund-raisers were successful in their contacts with potential donors who had never given before about as frequently as were fund-raisers for other universities in their contacts with such people.
B.This year the average size of the donations to Smithtown University
from new donors when the university’s fund-raisers had contacted was larger than the average size of donations from donors who had given to the university before.
C.This year most of the donations that came to Smithtown University
from people who had previously donated to it were made without the university’s fund-raisers having made any contact with the donors.
D.The majority of the donations that fund-raisers succeeded in getting for Smithtown University
this year were from donors who had never given to the university before.
E.More than half of the money raised by Smithtown University
’s fund-raisers came from donors who had never previously donated to the university.

这道逻辑题从题目上来看是反驳一个事实，并从反面来削弱原来的结论，这样的话，问题中说加强这个argument的话应该是找一个和反对意见一致的事实，为什么会是A呢，A应该是一个加强原来的结论吧？C为什么是无关选项

尹咖喱

"原文结论是does not indicate that they were doing a good job。就是水平不行。A说和其他学校的一样，所以削弱了文中的exceptionally high，也就支持了结论" 原文讲成功于得到 donations from 80% .... contacted，能搞定联络中的80%是成功之处，C中讲的是没有contact的人群，无关