troeconomics (ECON-5103-3) Given a nominal interest rate of 7 percent, in which of the following cases would you earn the lowest after-tax real interest rate? Select one: O a. None of the other choices are correct O b. Inflation is 4 percent, and the tax rate is 25 percent. O c. Inflation is 3 percent, and the tax rate is 20 percent. O d. Inflation is 1 percent, and the tax rate is 10 percent. O e. Inflation is 2 percent, and the tax rate is 15 percent