问题如下：
Which of the following statements is correct?
选项：
A.If two projects' NPV profiles have different discount rates, they will intersect.
B.Two projects' NPV profiles will intersect at their internal rate of return.
C.Two projects’ NPV profiles will intersect at the same discount rate that makes their net present values equal.
解释：
C is correct.
The two project’ NPV profiles will intersect at the discount rate that makes both projects have equal NPVs. We call it crossover rate.
老师，discount rate 就是图里的cost of capital 吗？要求回报率？
