A proposed change to federal income tax laws would eliminate deductions from taxable income for donations ataxpayer has made to charitable and educational institutions. If this change were adopted, wealthy individualswould no longer be permitted such deductions. Therefore, many charitable and educational institutions wouldhave to reduce services, and some would have to close their doors.

The argument above assumes which of the following?

【选项】Income tax laws should be changed to make donations to charitable and educational institutions the only permissible deductions from taxable income.