What Was the Roman Empire?s Attitude Toward Extension of Citizenship

What was the Roman empire?s attitude toward extension of citizenship?

A) Unlike the republic, the empire extended citizenship to important groups outside of Rome and the Italian peninsula.
B) Like the republic, the empire restricted citizenship to the original tribes of the city of Rome.
C) The empire extended citizenship to the allies of the Italian peninsula, but no farther.
D) The citizenship of the Roman empire was actually smaller than that of the republic.