About $\_\_\_\_\_\_\_\_$ percent of the total population of the U$.$S$.$ currently are active on social media.

A$.$

$80\mathrm{.}0$

B$.$

$60\mathrm{.}0$

C$.$

$40\mathrm{.}0$

D$.$

$10\mathrm{.}0$

E$.$

$20\mathrm{.}0$