问题如下：
When a company has $100,000 disposable funds that can invest, we know that:
Which of the following Plan is supposed to acceped when the opportunity cost of capital is equal to 10%?
选项：
A.Plan B.
B.Plan A.
C.Plan C
解释：
B is correct.
The NPV of Plan A =-100,000+142,000/1.1=29,091
The NPV of Plan B =-100,000+170,000/ (1.1)3 =27,724
The NPV of Plan C = -20,000+30,000/ (1.1)3 =2,539
这道题我直接选择了IRR最大的，对于这道题，这样有什么不妥吗？
