A 25-year maturity mortgage-backed bond is issued. The bond has a par value of $10,000 and promises to pay an 8 percent annual coupon. At issue, bond market investors require a 12 percent interest rate on the bond. Assume that 20 years after the bond is issued, bond market investors require a 15 percent interest rate on the bond. What is the market price of the bond?

A. $5,686

B. $6,863

C. $7,653

D. $14,270