Apisco Tiger Inc. has bonds outstanding with 9 years left to maturity. The bonds have a 6.5% annual coupon rate (coupons paid annually) and were issued 3 years ago at their par value of $1,000. However, due to changes in interest rates, the bond's market price has fallen to $975. What is the bond's yield to maturity today? A. 6.09 percent B. 6.88 percent C. 6.57 percent D. 7.56 percent