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Which are thought to have contributed to the decline of the Indus valley civilization? Choose all that are correct. A. People moved to more fertile regions of the subcontinent. B. The Indus river and its tributaries changed course C. Major sandstorms blanketed the cities, forcing people to leave. D. The soil became too salty for crops to grow. E. Cities were destroyed by raging fires

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SignoraPenguino
In the Indus River Valley, they used salt water for crops. Over time, the amount of salt poisoned the land. It was too salty and people did have to find fertile land. 

So, your answers should be...
A. People moved to more fertile regions of the subcontinent. 
D. The soil became too salty for crops to grow.

I hope this helps!
boss1010

A and D is your answer.

Hope this helps


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