Which of the following statements is CORRECT? Select one: a. If Project A's IRR exceeds Project B's, then A must also have the higher NPV. b. If the NPV is negative, the IRR must also be negative. c. If a project with normal cash flows has an IRR greater than the WACC, the project must also have a positive NPV. d. If a project with normal cash flows has an IRR less than the WACC, the project must have a positive NPV.