Answer:
a. free men born in that city-state
Step-by-step explanation:
The greek city states that developed in the greek empire were cities that had its own government and had the first stages of organized governments and legislature branches and division of powers, they had the first steps of democracy as well, as it only allowed male free-men that were born in that city state, women, childrens, foreigners and slaves were not considered citizens, so the best options would be "a. free men born in that city-state"