Assume the yield curve has a positive slope. You purchase a bond, hold it for a period of time and then sell. Which of the following describes "Roll-Down?" a. You will sell the bond at a lower yield-to-maturity than you bought it, which increases your ROR. b. You will sell the bond at a higher yield-to-maturity than you bought it, which increases your ROR. c. You will sell the bond at a lower yield-to-maturity than you bought it, which deceases your ROR. d. You will sell the bond at a higher yield-to-maturity than you bought it, which decreases your ROR.