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.
