[求助]og-5，突然卡住了，请求帮助！

A program instituted in a particular state allows parents to prepay their children’s future college tuition at current rates. The program then pays the tuition annually for the child at any of the state’s public colleges in which the child enrolls. Parents should participate in the program as a means of decreasing the cost for their children’s college education.

Which of the following, if true, is the most appropriate reason for parents NOT to participate in the program?

A. the parents are unsure about which public college in the state the child will attend.

B. The amount of money accumulated by putting the prepayment funds in an interest-bearing account today will be greater than the total cost of tuition for any of the public colleges when the child enrolls.

C. The annual cost of tuition at the state’s public colleges is expected to increase at a faster rate than the annual increase in the cost of living.

D. Some of the state’s public colleges are contemplating large increases in tuition next year.

E. The prepayment plan would not cover the cost of room and board at any of the state’s public colleges.

The passage recommends that parents participate in a tuition prepayment program as a means of decreasing the cost of their children’s future college education. If B is true, placing the funds in an interest bearing account would be more cost-effective than participating in the prepayment program. Therefore, B would be a reason for NOT participating and is the best answer.

原文的逻辑关系： 参加prepayment program ——》cost(tuition)减少

Ｂ：把预付款存放到付利息的帐户中所积累起来的钱大于任何大学的学费．

请问ＯＧ关于Ｂ的解释？

placing the funds in an interest bearing account would be more cost-effective than participating in the prepayment program. 是什么意思？

 cost-effective 怎么解释？

Ｂ怎么反驳原文的逻辑关系？

楼主都把B翻出来了,那样理解是对的.就是说把那些钱放到付利息的帐户中所积累起来的钱要比文章说的rogram来的和算.实际上就是在说那个program不如把钱存起来要好.

另外你说的"原文的逻辑关系： 参加prepayment program ——》cost(tuition)减少",我理解可能就是每月存一点,累加十几年后,可以用这些钱交学费.不是说学费变少了.