Which of the following statements are true?

I: The NPV method takes into account all the cash flows associated with a particular project

II: In situations where IRR and NPV give conflicting decisions, NPV decision should be preferred

III: If present value of cash inflow is less than present value of cash outflow, the NPV is said to be negative and the investment proposal is rejected

IV: Nonconventional projects are ones that involve cash outflows not only at the beginning but also later