Which is a true statement regarding using a higher discount rate to calculate the net present value of a project?

a) It will make it less likely that the project will be accepted.

b)It will make it more likely that the project will be accepted.

c)It is appropriate to use a higher rate if the project is perceived as being less risky than other projects being considered.

d) It is appropriate to use a higher rate if the project will have a short useful life relative to other projects being considered.