问题如下：
Projects 1 and 2 have similar outlays, although the patterns of future cash flows are different. The cash flows as well as the NPV and IRR for the two projects are shown below. For both projects, the required rate of return is 10 percent.
The two projects are mutually exclusive. What is the appropriate investment decision?
选项：
A.Invest in both projects.
B.Invest in Project 1 because it has the higher IRR.
C.Invest in Project 2 because it has the higher NPV.
解释：
C is correct.
When valuing mutually exclusive projects, the decision should be made with the NPV method because this method uses the most realistic discount rate, namely the opportunity cost of funds. In this example, the reinvestment rate for the NPV method(here 10 percent) is more realistic than the reinvestment rate for the IRR method (here 21.86 percent or 18.92 percent)
老师，这题是否直接简单粗暴地对比npv就好？不用考虑crossover rate
