O'brien Ltd.'s outstanding bonds have a $1,000 par value, and they mature in 25 years. Their nominal yield to maturity is 9.25%, they pay interest semiannually, and they sell at a price of $850. What is the bond's nominal (annual) coupon interest rate?
A. 6.27%
B. 6.60%
C. 6.95%
D. 7.32%
E. 7.70%