Assume a project has normal cash flows. All else equal, which of the following statements is CORRECT?

a) A project's NPV increases as the WACC declines.

b) A project's IRR increases as the WACC declines.

c) A project's discounted payback increases as the WACC declines.

d) A project's regular payback increases as the WACC declines.

e) A project's MIRR is unaffected by changes in the WACC.