单选题
编号：2690746
1. Which of the following statements regarding a sinking fund provision is true? A sinking fund provision:
- A.Requires that the issuer should set aside money based on a predefined schedule to accumulate the cash to retire the bonds at maturity.
- B.Requires that the issuer should retire a portion of the principal through a series of predefined principal payments over the life of the bond.
- C.Must be made through the payment of cash,paid to the trustee based on a predetermined schedule.