A. A single currency was established to facilitate trade within the empire.
B. A series of roads unified the Roman Empire.
C.The empire stretched from Spain to Assyria and from North Africa to Great Britain.
Explanation:
Regarding the last point, Romans were not known for their mercy or tolerance of other cultures. They did not promote assimilation. Conquered peoples were imposed Roman rule and taxes, laws and norms, there was no policy of cultural assimilation of vanquished peoples.
Because people didnt know who to trust and also they wanted to blame people for starting WW1 and as Hitler decided to be injust to the jews, other people folloeed Hitler's decisions.
Renaissance Characters were more gregarious. renaissance literature focused on man himself, the progress of arts and sciences, and the emergence of humanism.