Who ruled the city-states of Sumer?

Sumer’s city-states were first ruled by priest-kings, known as Ensi. As society grew more complex, however, and city-states began battling over land and water rights, a secular kingship began, with the rule of a city-state in the hands of a Lugal , or strong man. The Lugal supervised wars and oversaw important trade with other lands.

Explanation:

Thefre Sumer's city states were first ruled by priest-kings.

d.) continue to rise rapidly