Which of the following statements concerning coupon rate structures is FALSE （）

A. Step-up notes have coupon rates that increase over time at a pre-specified rate.

B. Accrual bonds have only one cash inflow at maturity.

C. Accrual bonds, like zero-coupon bonds, always sell at a discount to face value.

Windows的图形用户窗口是Windows的 【16】 程序。