66.
Bank depositors in the United States are all financially protected
against bank failure because the government insures all individuals' bank
deposits. An economist argues that this
insurance is partly responsible for the high rate of bank failures, since it
removes from depositors any financial incentive to find out whether the bank
that holds their money is secure against failure. If depositors were more selective, then banks
would need to be secure in order to compete for depositors' money.
The economist's argument makes which of the following assumptions?
(A) Bank failures are caused when big borrowers default on loan
repayments.
(B) A significant proportion of depositors maintain accounts at several
different banks.
(C) The more a depositor has to deposit, the more careful he or she tends
to be in selecting a bank.
(D) The difference in the interest rates paid to depositors by different
banks is not a significant factor in bank failures.
(E) Potential depositors are able to determine which banks are secure
against failure.
答案为E
请问选项D为什么错？？？请讲讲思路，谢谢啦 | 
