A computer has the IPv$4$ address $192\mathrm{.}168\mathrm{.}0\mathrm{.}23$ and a subnet mask of $255\mathrm{.}255\mathrm{.}255\mathrm{.}0.$ Which of these addresses represents a possible default gateway address? $($Choose all that apply.$)$

a$.192\mathrm{.}168\mathrm{.}0\mathrm{.}1$

b$.192\mathrm{.}168\mathrm{.}0\mathrm{.}254$

c$.193\mathrm{.}168\mathrm{.}0\mathrm{.}1$

d$.0\mathrm{.}0\mathrm{.}0\mathrm{.}1$

e$.127\mathrm{.}0\mathrm{.}0\mathrm{.}1$