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

1 answer

like Julius Caesar

D. Civil war, corruption, and The rise of tyrants like Julius Caesar