Suppose Tapley Inc. uses a WACC of 8% for below-average risk projects, 10% for average-risk projects, and 12% for above-average risk projects. Which of the following independent projects should Tapley accept, assuming that the company uses the NPV method when choosing projects? a. Project C, which has above-average risk and an IRR = 11%. b. Project A, which has average risk and an IRR = 9%. c. Without information about the projects' NPVs we cannot determine which one or ones should be accepted. d. Project B, which has below-average risk and an IRR = 8.5%. e. All of these projects should be accepted as they will produce a positive NPV.