A fixed income portfolio manager wants to take advantage of a forecast decline in interest rates over the next several, months. Which of the following combinations of maturity and coupon rate would most likely result in the largest increase in portfolio value?
　　Maturity　　　　　Coupon rate

A.2020　　　　　　　7%

B.2020　　　　　　　13%

C.2035　　　　　　　7%