The people of Mesopotamia lived as farmers and herders in communities (D) before the formation of city-states.
The scientific revolution laid the foundations for the Age of Enlightenment, which centered on reason as the primary source of authority and legitimacy, and emphasized the importance of the scientific method.
The Greeks were not as united as surrounding countries because of the geographical features. Therefore Greece made city states that were ruled by local leaders. These were small civilizations. Sparta and Athens are examples of city - states
A union of political units for common action in relation to other units.
A is the answer i believe
