The before$-$tax cost of debt for a $9-$year, $7$ percent, $$1,000$ par value bond selling at $$1,150$ is approximately $\_\_\_\_\_\_\_\_.$

A$)5\mathrm{.}97$ percent

B$)8\mathrm{.}33$ percent

C$)8\mathrm{.}82$ percent

D$)4\mathrm{.}9$ percent