Which of the following bonds will be least sensitive to a change in interest rates? O A. a 20-year bond with a $3,000 face value whose yield to maturity is 6.0% and coupon rate is 5.4% APR paid semiannually B. a 15-year bond with a $5,000 face value whose yield to maturity is 7.4% and coupon rate is 6.2% APR paid annually C. a 30-year bond with a $1,000 face value whose yield to maturity is 5.5% and coupon rate is 6.4% APR paid annually OD. a ten-year bond with a $2,000 face value whose yield to maturity is 5.8% and coupon rate is 5.8% APR paid semiannually