Identify two events that helped Octavian to become the only ruler of the Roman Empire.
A. Julius Caesar named Octavian as his heir.
B. Octavian successfully defeated his rival Mark Antony in war.
C. Octavian formed an alliance with the Carthaginian empire.
D. Julius Caesar was deeply unpopular among the plebeians of Rome.
E. Emperor Augustus supported Octavian’s rise to power.