The difference between the present value of future after-tax cash inflows and the present value of future cash outflows of an investment project is the:

		A) Internal rate of return (IRR) of the project.
		B) Modified internal rate of return (MIRR) on the project.
		C) Book (accounting) rate of return for the project.
		D) Net present value (NPV) of the project.
		E) Modified internal rate of return (MIRR) of the project.