Which of the Following Is Not an Advantage of IRR

Which of the following is not an advantage of IRR?

A) It uses the concept of a rate of return, which is familiar to many managers.
B) It incorporates the time value of money by not treating cash received in different years as equal.
C) There is only one IRR for every investment.
D) It uses cash flows and not profits, and the payment of cash outflows is more closely aligned with cash inflows than profits would be.