Assume that you$$ve been given an IP address in CIDR notation of $156\mathrm{.}51\mathrm{.}7\mathrm{.}27/16.$ What netmask is being used?

Group of answer choices

$255\mathrm{.}0\mathrm{.}0\mathrm{.}0$

$255\mathrm{.}255\mathrm{.}0\mathrm{.}0$

$255\mathrm{.}255\mathrm{.}255\mathrm{.}0$

$255\mathrm{.}16\mathrm{.}0\mathrm{.}0$

There$$s not enough information to determine the netmask.