Last year, you bought a bond with face value $1000, maturity 20 years, coupon rate of 7% per year payable semi-annually and yield to maturity of 5.5% per year. Currently the bond sells for $900. How much would be your total yield if you sell this bond today?

A) 10.78%

B) 13.71%

C) (17.84%)

D) (15.79%)