2005年gmat模拟测试光盘一道逻辑题

柿子头

A proposed change to federal income tax laws would eliminate deductions from taxable income for donations a taxpayer has made to charitable and educational institutions.If this change were adopted, wealthy individuals would no longer be permitted such deductions. Therefore, many charitable and educational institutions would have to reduce services, and some would have to close their doors.

   The argument above assumes which of the following?

A.

Without the incentives offered by federal income tax laws,        at least some wealthy individuals wouldnot donate as much money to charitable and educational institutions as they otherwise would have.

B

Money contributed by individuals who make their donations because of provisions in the federal tax laws provides the only source of funding for many charitable and educational

instituions.

答案A，请问B怎么不对？

如果个人捐款不是慈善和教育机构的唯一来源的话，这些机构怎么可能减少服务甚至关门呢？

我认为答案A不对的理由是如果个人捐款不是慈善和教育机构的唯一来源的话，个人捐款即使减少，只要有其他财政来源，这些机构不可能减少服务甚至关门。

NN指教。

crystalno_1

Please check OG 195