Which of the following statements is correct? A. a. Underlying the MIRR is the assumption that cash flows can be reinvested at the firm's cost of capital. B. b. Underlying the IRR is the assumption that cash flows can be reinvested at the firm's cost of capital. C. c. Underlying the NPV is the assumption that cash flows can be reinvested at the firm's cost of capital. D. d. The discounted payback method always leads to the same accept/reject decisions as the NPV method. E. e. Statements a and c are both correct.