Ouestion $1[20$ Marks$]$

I. Choose the best answer.

The network address for the shown bus network is: $($Show Steps$)[3$ marks$]$

A$.10\mathrm{.}0.\frac{0\mathrm{.}0}{16}$

B$.10\mathrm{.}0.\frac{0\mathrm{.}0}{17}$

C$.10\mathrm{.}0.\frac{64\mathrm{.}0}{18}$

D$.10\mathrm{.}0.\frac{80\mathrm{.}0}{20}$

E$.10\mathrm{.}0.\frac{80\mathrm{.}0}{24}$