Consider two IPv$4$ addresses: $192\mathrm{.}168\mathrm{.}1\mathrm{.}1$ and $192\mathrm{.}168\mathrm{.}2\mathrm{.}1,$ Which of the following subnet masks would you use to ensure that the two addresses are on the same network?

Group of answer choices

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

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

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

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