Which of the following statements is CORRECT?
a. If a bond is selling at a premium, this implies that the bond's yield to maturity exceeds its coupon rate.
b. If a coupon bond is selling at par, its current yield equals its yield to maturity.
c. If rates fall after its issue, a zero-coupon bond could trade for an amount above its par value.
d. If rates fall rapidly, a zero-coupon bond's expected capital gains yield could become negative.
e. If a firm is in financial distress, its bonds' yield to maturity is likely to fall.