Which factor prevented the Mesopotamian city-states from uniting before 2400 BCE?

No ruler was powerful enough to take over the other city-states.
The city-states rarely interacted due to the distance between them.
The city-states were very diverse in their religious beliefs and practices.
The languages spoken in Mesopotamia differed greatly among the city-states.

For much of the 1400 years from the late twenty-first century BCE until the late ... Babylon was a minor city-state in central Mesopotamia for a century after it was

Explanation:

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