Project X has an internal rate of return of 20 percent. Project Y has an internal rate of return of 15 percent. Both projects have a positive net present value. Which of the following statements is most correct? Select one: a. Project X must have a higher net present value than Project Y. b. If the two projects have the same WACC, Project X must have a higher net present value. c. Project X must have a shorter payback than Project Y. d. Both answers b and c are correct. e. None of the above answers is correct.