Psychologists suggest that to cure cruelty

According to the author, all of those who migrate

1. 
   try to escape from overpopulation in the area
   
2. 
   are under some form of state persecution
   
3. 
   are members of an ethnic group who seek political freedom
   

D) have some sort of dissatisfaction with their native land

2. The main reason that most migrants leave their homelands is that

1. 
   they want to practice their religion freely
   
2. 
   their political ideas conflict with those of the state
   
3. 
   they are driven away by the hostile climate of the region
   
4. 
   they think they can make more money elsewhere