O'Brien Ltd.'s outstanding bonds have a $1,000 par value, and they mature in 25 years. Their nominal annual, not semiannual yield to maturity is 9.25%, they pay interest semiannually, and they sell at a price of $900. What is the bond's nominal coupon interest rate?

a. 8.22%

b. 8.71%

c. 6.74%

d. 9.78%

e. 8.55%