题目选项分析

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?

【选项】The difference in the interest rates paid to depositors by different banks is not a significant factor in bank failures.