You work as a risk manager for Fuji Mountain Bank $($FMB$)$ which has liabilities of a $2-$year, $$8$ million bank note, currently selling at par, with a $6\%$ semi$-$annual coupon rate. What is the duration of FMB$\text{'}$s liabilities?

A$.$

$3\mathrm{.}83$ years

B$.$

$1\mathrm{.}69$ years

C$.$

$1\mathrm{.}91$ years

D$.$

$1\mathrm{.}76$ years