In a medical study, it is found that the concentration $C,$ in milligrams per liter $(m\frac{g}{L}),$ of a certain medication in the bloodstream is modeled by the function

$C(t)=\frac{6t}{t^2+2}$

where $t$ is the time in minutes after the medicatin is administered.

After how many minutes, to the nearest tenth of a minute, does the concentration of the medication in the bloodstream drop below $0\mathrm{.}5m\frac{g}{L}?$

Select one:

A$.0\mathrm{.}2$

B$.1\mathrm{.}0$

C$.2\mathrm{.}0$

D$.11\mathrm{.}8$