For the Class C network address $192\mathrm{.}168\mathrm{.}10\mathrm{.}0,$ which one of the following subnet masks provides $32$ subnets?

a$.$

$255\mathrm{.}255\mathrm{.}255\mathrm{.}252$

b$.$

$255\mathrm{.}255\mathrm{.}255\mathrm{.}248$

c$.$

$255\mathrm{.}255\mathrm{.}255\mathrm{.}240$

d$.$

$255\mathrm{.}255\mathrm{.}255\mathrm{.}224$