Which statement best describes a similarity between the political systems in ancient greece and the roman republic?

The similarity between the political systems in the Roman Republic and ancient Greece is that both of them avoided having a centralization political power given in the hands of a single person. Both of them also allowed common men to share their opinion about the government which brought the problems in the local areas within the territory or city and this represents the word of their people. Both of them also had some sort of elections. Also, both of them prohibited slaves and women from participating in any political processes. 

Existing to a lot of people