Given the address $201\mathrm{.}180\mathrm{.}56\mathrm{.}5($class C$),$ what is the beginning address $($network address$)?$

$201\mathrm{.}180\mathrm{.}56\mathrm{.}5$

$201\mathrm{.}180\mathrm{.}56\mathrm{.}0$

$201\mathrm{.}180\mathrm{.}0\mathrm{.}0$

$201\mathrm{.}0\mathrm{.}0\mathrm{.}0$