Which of the following bonds will be most sensitive to a change in interest rates if all bonds have the same initial yield to maturity? A. a ten year bond with a $1,000 face value whose coupon rate is 7.4% APR paid semiannually B. a ten year bond with a $1,000 face value whose coupon rate is 5.8% APR paid semiannually C. a 20 year bond with a $1,000 face value whose coupon rate is 7.4% APR paid semiannually D. a 20 year bond with a $1,000 face value whose coupon rate is 5.8% APR paid semiannually