What command would you issue from the command prompt to test whether your computer has connectivity to the gateway?

a$.$

Ping $192\mathrm{.}168\mathrm{.}254\mathrm{.}254$

b$.$

Ping $192\mathrm{.}168\mathrm{.}256\mathrm{.}254$

c$.$

Ping $192\mathrm{.}168\mathrm{.}0\mathrm{.}256/$t

d$.$

Ping $255\mathrm{.}255\mathrm{.}255\mathrm{.}255/$t