1.        GWD-2-Q14:

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?

1. 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.

2. 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.

3. 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.

4. 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.

5. More than half of the money raised by Smithtown
         University’s fund-raisers came from donors who had never previously donated to the university.

答案A是什么意思？没看明白啊

同问啊，要顶起来！死活都想不明白，我选的是C。谢谢各位大牛！