今天刚做的一道PP3的题

A proposal change to federal income tax laws would eliminate deductions from texable income for donations a taspayer has made to charitable and educational institutions. If this change were adopted, wealthy individuals would no longer be permited 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 would not donate as much money to charitable and educational institutions as they otherwise would have.

B. Money distributed 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 institutions.

我觉得这两个答案都有一定的道理，答案选A，我选了B。我觉得A说at least some，那么至少还有其他人的donation可以资助这些机构，B的条件是不是更强一点？

觉得B无关,B说法律规定charitable and educational institutions钱的来源只有一种渠道.

而A是假设:因为人们donation ,都是为了deductions.而一旦 eliminate deductions ,就直接减少了donation的意愿.