Answer:
The answers are C and E.
c) The soil became too salty for crops to grow;
e) People moved to more fertile regions of the subcontinent.
Explanation:
The Indus River Valley civilization (3300-1300 BCE) used to use salt water on their agricultural system. So, as the times passes the salt overloaded the soil making it inappropriate to grow anything; thus forcing the civilization to move to more fertile regions in order to have more stable and abundant crops. 
 
        
             
        
        
        
I think White House of staffs
        
             
        
        
        
I believe the answer is: Values
The values which held by all people would be the basic foundation for them to evaluate and give judgement for other people's behaviour and  what is important in their life.It also determine how they choose to spend their time and their ultimate fulfilment.