Refer to the exhibit. A network administrator has to develop an IP addressing scheme that uses the $192\mathrm{.}168\mathrm{.}1\mathrm{.}0/24$ address space. The network that contains the serial link has already been addressed out of a separate range. Each network will be allocated the same number of host addresses. Which network mask will be appropriate to address the remaining networks?

Select one:

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

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

c$.255\mathrm{.}255\mathrm{.}255\mathrm{.}192$

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

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