When using the Net Present Value methodology to evaluated Capital

Projects$\_\_\_\_\_\_\_\_\_\_\_.$

a$.$ one should discount the future cash flows including the project costs at the WACC rate.

b$.$ one should discount the future cash flows at the required return excluding the project

costs.

c$.$ one should discount future cash flows including the project costs at the IRR rate.

d$.$ one should ignore the NPV calculation if the payback period is greater than $4$ years.

e$.$ one should discount the future cash flows excluding project costs at the IRR rate