Which of the following statements regarding the net present value (NPV) and internal rate of return (IRR) is least accurate（）
A. The NPV tells how much the value of the firm will increase if you accept the project.
B. For mutually exclusive projects, the internal rate of return IRR and the net present value NPV methods may give conflicting accept/reject decisions.
C. For mutually exclusive projects, you must accept the project with the highest NPV regardless of the sign of the NPV calculation.