What caused Rome to change from a republic to an empire?
A. Burning and looting of Rome by invading barbarians
B. The citizens of Rome voting to switch from a republic to an empire
C. The loss of a long war against the army of Carthage led by Hannibal
D. Civil war, corruption, and The rise of tyrants
like Julius Caesar
D. Civil war, corruption, and The rise of tyrants like Julius Caesar