A bond with a par value of $1,000 has an annual interest payment of $85. The bond currently sells for $850 and has 8 years to maturity. Which of the following is true?

A.) The current yield on the bond must be 8.5%

B.)The investor's required rate of return must be 8.5%

C.) The coupon rate must be 8.5%

D.) The yield to maturity must be 8.5%