Absalom Energy's 13% coupon rate, semiannual payment, $1,000 par value bonds that mature in 20 years are callable 2 years from now at a price of $950. The bonds sell at a price of $1,100.25. What is the coupon rate of Absalom Energy's bonds?

A) 13%
B) 11%
C) 15%
D) 10%