in which of the following cases is the after-tax real interest rate highest? group of answer choices inflation is 4%, the pre-tax real interest rate is 2%, and the tax rate is 25%. inflation is 6%, the pre-tax real interest rate is 3%, and the tax rate is 25%. inflation is 4%, the pre-tax real interest rate is 2%, and the tax rate is 20%. inflation is 6%, the pre-tax real interest rate is 3%, and the tax rate is 20%.