GWD

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.

    

 这个题目有点没看明白， 请牛牛翻译下， 然后给下思路， 谢谢