angelbrate2 angelbrate2 08-05-2020 History contestada HELP. ASAP HELP ASAP What marked the official transition from Roman Republic to Roman Empire? (4 points) Group of answer choices When Gaius Marius began his rule as Consul When Augustus, formally known as Octavian became Emperor of Rome When Sulla marched on Rome and declared himself dictator When Tiberius beliefs threatened the Senate and gained support of Rome's underclass