For the following bond, Par value: $1,000$ Coupon rate $8\%$ paid annually Time to maturity: $3$ years Interest rate: $7\%$ What is the modified duration? A $\mathrm{.}3,53$ years B $\mathrm{.}3\mathrm{.}18$ years C$.2\mathrm{.}60$years D$.2\mathrm{.}10$ years