Mr$.$ Tramp made a mortgage $5$ years ago for $$85,000$ at $8\mathrm{.}25\%$ interest and a $15$ year term. Rates have now risen to $10\%$ for an equivalent loan. Mr$.$ Tramps lender is willing to discount the loan by $$2,000$ if he will prepay the loan. What rate of return would Mr$.$ Tramp receive by prepaying the loan?$($A$)7\mathrm{.}83\%($B$)10\mathrm{.}24\%($C$)14\mathrm{.}32\%($D$)9\mathrm{.}14\%$