What were characteristics of the Roman Empire at its height? Choose all answers that are correct.

A.) Set legal principles and respect for the governed helped unify the Roman Empire.

B.) There were several official languages in the vast Roman Empire.

C.) A single currency was established to facilitate trade within the empire.

D.) A series of roads unified the Roman Empire.

E.) The empire stretched from Spain to Assyria and from North Africa to Great Britain.

F.) I HAVE TO F. ING IDIA

What is the main difference between primary and secondary sources? a. primary sources are historical documents, and secondary sources are modern-day documents. b. primary sources are derived from museums and archives, and secondary sources are created by history students and academics. c. primary sources are found in ancient places with a rich history, and secondary sources are found in historical journals and blogs. d. primary sources are created during a particular historical era, and secondary sources are created by studying primary sources.