55. Low-income families are often unable to afford as much child care as they need. One government program would award low-income families a refund on the income taxes they pay of as much as $1,000 for each child under age four. This program would make it possible for all low-income families with children under age four to obtain more child care than they otherwise would have been able to afford.

Which of the following, if true, most seriously calls into question the claim that the program would make it possible for all low-income families to obtain more child care?

(A)       The average family with children under age four spends more than $1,000 a year on child care.

(B)       Some low-income families in which one of the parents is usually available to care for children under age four may not want to spend their income tax refund on child care.

(C)      The reduction in government revenues stemming from the income tax refund will necessitate cuts in other government programs, such as grants for higher education.

(D)      Many low-income families with children under age four do not pay any income taxes because their total income is too low to be subject to such taxes.

(E)       Income taxes have increased substantially over the past 20 years, reducing the money that low-income families have available to spend on child care.

B     Although the money is to be in the form of a refund that could be spent however the family wished, it is the availability of additional money that is the point of the claim.  .

无法理解B.

既然这个programe的目的就是improve children care,如果说Low-income families 不把这笔钱用于children care.这项programe不就没有达到目的吗?

注意B答案中： may not want to spend their income tax refund on child care.

既然是may not want，那么就可以may want，这个答案本身的论断就不严谨。