Which factors rome change from a republic to an empire?
a. its geography made rome vulnerable to invasion.
b. augustus was proclaimed emperor following a civil war.
c. julius caesar created a dictatorship.
d. the people transformed rome from a republic to a representative democracy.

One of the main factors that helped Rome change from a republic to an empire was the proclamation of Augustus as an emperor following a civil war. Augustus, who succeeded Julius Caesar, went to war with Queen Cleopatra from Egypt. The Battle of Actium, as it came to be known, was Rome’s last war to crush the Egyptian Empire. Though Augustus lost his life, he was declared a hero and promoted to the Status of Emperor. Rome then became an Empire.