Suppose the U.S. Treasury offers to sell you a bond for $3,000. No payments will be made until the bond matures 10 years from now, at which time it will be redeemed for $5,600. What interest rate would you earn if you bought this bond at the offer price?

a. 7.47%

b. 6.25%

c. 7.92%

d. 5.41%

e. 6.44%