Cold Boxes Ltd. has 100 bonds outstanding (maturity value = $1,000). The required rate of return on these bonds is currently 10 percent, and interest is paid semiannually. The bonds mature in 5 years, and their current market value is $768 per bond. What is the annual coupon interest rate? Please show work.

A 2%

B 6%

C 0%

D 8%

E 4%