Which of the following methods of evaluating capital investment projects incorporates the time value of money concept? Select one: O a. The discounted payback measure exhibits the value additivity property. O b. Discounted payback period, net present value (NPV), and internal rate of return only O c. Payback period, discounted payback period, and net present value (NPV) only d. Net present value (NPV) and internal rate of return only