Which of the following statements is CORRECT? Select one: O a. If a firm moves from a position of strength toward financial distress, its bonds' yield to maturity would probably decline. O b. If rates fall rapidly, a zero coupon bond's expected appreciation could become negative. O c. If rates fall after its issue, a zero coupon bond could trade at a price above its maturity (or par) value. O d. If a coupon bond is selling at par, its current yield equals its yield to maturity. e. If a bond is selling at a premium, this implies that its yield to maturity exceeds its coupon rate