Which did the early river valley civilizations have in common?

A.
They began near rivers because they had developed complex trade networks.

B.
They developed in river valleys because flood waters left behind fertile soil for farming.

C.
They built cities along the banks of rivers to protect them from invasion.

D.
They settled in the valleys away from rivers to avoid floods.

Question

Which did the early river valley civilizations have in common?  
 
 

 
 

  

  A. 
  They began near rivers because they had developed complex trade networks.   
   

 
 

  

  B. 
  They developed in river valleys because flood waters left behind fertile soil for farming.   
   

 
 

  

  C. 
  They built cities along the banks of rivers to protect them from invasion.   
   

 
 

  

  D. 
  They settled in the valleys away from rivers to avoid floods.

anonymous · Answer

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