Find the correct statements regarding the risk-adjusted discount rate (RADR) approach ?

(A) Under the RADR approach, we should accept a project if its net present value (NPV) calculated using a risk-adjusted discount rate is positive.

(B) Adjusting the firm's overall cost of capital upward is required if the project or group are of higher than average risk.

(C) Under the RADR approach, we would still compare a project's internal rate of return (IRR) to the firm's overall weighted-average cost of capital in order to decide acceptance/rejection.

(D) Adjusting the firm's overall cost of capital downward is required if the project or group are of lower than average risk.