How Did the Government of the Roman Republic Change Over Time?

the Roman Republic began in 509 B.C. when the Romans expelled the Etruscan kings and set up their own government. Having witnessed the problems of the monarchy on their own land, and aristocracy and democracy among the Greeks, they opted for a mixed form of government, with three branches. This innovation became known as a republican system.

Explanation:

your answer is

to dominate europe

and i know for a fact it can't be the others

i thinl it is the 1st answer