Which one of the following statement is incorrect? a. If projects are of a different scale, the IRR rule may give an inc

[answerhappygod]

Which one of the following statement is incorrect?
a. If projects are of a different scale, the IRR rule may give
an incorrect ranking and result in selection of a project with a
lower NPV.
b. NPV profile shows the NPV for different values of the cost of
capital.
c. If there are negative cash flows after the first positive
cash flows from a project, it is impossible for there to be
multiple internal rates of return.
d. NPV profile is useful if there is some doubt as to the true cost
of capital.