GWD刚做完的一道争议题 求助啊..

annyyjxm

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.

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.
我觉得原文说了好多但最后结论就是the high success rate shows insufficient canvassing effort。作者说的就是不成功 那支持不成功的不就是应该选C吗..为什么好多人都肯定选A？..

qingsunfr

gmatclub 上说 OA 是 C
http://gmatclub.com/forum/smithtown-university-s-fund-raisers-succeeded-in-getting-78924.html

云游

答案是A
argument中讨论的都是success rate；BCDE都是在说amount。