Which of the following bonds would have the greatest percentage increase in value if all interest rates in the economy fall by 1%? Seleccione una o a. 20-year, zero coupon bond. O b. 10-year, zero coupon bond. O C. 20-year, 5% coupon bond. d. 1-year, 10% coupon bond o e. 20-year, 10% coupon bond