All of the above is the correct answer
        
                    
             
        
        
        
Jackson.
Jackson encouraged Congress to adopt the Removal Act of 1830. The Act established a process whereby the President could grant land west of the Mississippi River to Indian tribes that agreed to give up their homelands.
 
        
                    
             
        
        
        
Answer:
Well it depends are you going back to doing something that is bad for you, Then you need to try your hardest to not going back to doing it. 
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Answer:
the "they" being referred to is the scientists
Explanation: