Assume a project has normal cash flows. All else equal, which of the following statements is CORRECT? a. A project's IRR increases as the WACC declines. b. A project's NPV increases as the WACC declines. c. A project's MIRR is unaffected by changes in the WACC. d. A project's regular payback increases as the WACC declines. e. A project's discounted payback increases as the WACC declines