Which of the following are the situations where the IRR method should not be used for decision-making?

A. There are two mutually exclusive projects.

B. There is at least one negative and one positive cash flow in the future. And the cost today is non-zero.

C. The cashflow at 0 is positive, while all the cash flows in the future are negative.

D. There are more than 50 cash flows .

E. There is at least one zero cash flow period.