Charley is an active investor who often invests in tax shelters to defer income tax on his business income. He used the net present value (NPV) and internal rate of return (IRR) methods to compare the return on the following investments: Investment A has a NPV of $15,000 and an IRR of 10%; Investment B has an NPV of $0 and an IRR of 7%; and Investment C has an NPV of minus $1,500 and an IRR of 6.7%. If Charley's minimum acceptable return (MAR) is 7%, which of the following investments should he accept? Investment A or B. Investment B or C. Investment Conly. Investment A only