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.

How does the grapes of wrath identify the effects of americans' views on the dust bowl? the story is a depiction of oklahoma farmers and the difficulties they experienced migrating to california. the story accurately describes the impact the california vineyard industry had on migrant workers. the story covers the rise of corporate farming and the devaluation of the small family farms that dotted the great plains. the story is an allegory for the conflicts between american values and the rise of the communist party in the united states.

The constitution protects the rights of citizens by limiting the power of government

Which of these is not a criticism of the concentric zone model? it does not accurately describe cities after the rise of suburban development. it only applies to cities that grew after the development of the automobile. it assumes that inner-city areas will always be repurposed instead of abandoned. it places too much importance on the traditional central business district.