Which of the following statements is correct?

A - A projects's regular IRR is found by discounting the cash inflows at the WACC

B - To find a project's IRR, we must solve for the discount rate that causes the PV of the future cash flows to equal the project's investment cost

C - to find a project's IRR, we must find a discount rate that is equal to the WACC

D - if a project's IRR is greater than the WACC, then its NPV must be negative