QUESTION $9$

which of the following IP address is a class C address?

a$.100\mathrm{.}121\mathrm{.}3\mathrm{.}4$

b$.180\mathrm{.}151\mathrm{.}129\mathrm{.}200$

c$.250\mathrm{.}120\mathrm{.}22\mathrm{.}35$

d$.200\mathrm{.}121\mathrm{.}199\mathrm{.}100$