26. Which of the following methods of evaluating capital investment projects incorporates the time value of money concept? A. Payback period, discounted payback period, and net present value (NPV) only ; Discounted payback period, net present value (NPV),and internal rate of return only C. Net present value (NPV) and internal rate of return only D. Payback period, discounted payback period, net present value (NPV), and internal rate of return