单选题 Which of the following statements about the valuation of an option-free bond is most likely correct? Other things equal: A. whether the bond's value will increase or decrease when rates increase depends on whether the bond is selling at a discount, at par, or at a premium. B. the value of a long-term bond is more sensitive to interest rate changes than the value of a short-term bond. C. the value of a low-coupon bond is less sensitive to interest rate changes than the value of a high-coupon bond.