问题如下：
5. Is Böhm most likely correct regarding Comment A about the $10 million investment and Comment B about using the after-tax cost of debt?
选项：
A.No for both comments.
B.Yes for both comments.
C.No for Comment A and Yes for Comment B.
解释：
A is correct.
The $10 million original cost is a sunk cost and not relevant. The correct investment is today’s opportunity cost, the market value today. The correct discount rate is the project required rate of return.
老师，我记得李老师特意举过一个例子说一个土地是之前买的， 现在我用来做工厂，要不要算进去， 老李说算进去，因为我用它来做工厂就不能做别的了， 所以是一种机会成本。
为啥这个题和老李讲得不一样呢？
