4 . MS . Lenz has $100 ,000 in an investment paying 9% annual interest . Her marginal tax rate is 25% . Which of the following statements is false ? se A . MS . Lenz's annual before - tax cash flow from this investment is $9.000 B . If the interest is tax exempt , MS . Lenz's annual after - tax cash flow is $9000 C . If the interest is taxable . MS . Lenz's annual after - tax cash flow is $6. 750 D. None of these is false