问题如下：
When assembling the cash flows to calculate an NPV or IRR, the project’s after-tax interest expenses should be subtracted from the cash flows for:
选项：
A.the IRR calculation, but not the NPV calculation.
B.both the NPV calculation and the IRR calculation.
C.neither the NPV calculation nor the IRR calculation.
解释：
C is correct.
Financing costs are not subtracted from the cash flows for either the NPV or the IRR. The effects of financing costs are captured in the discount rate used.
ignore 沉默成本和融资成本的意思不是要减去这两项，而是不用对CF就这两项进行调整（减去）的意思是吗
