Psychologists suggest that to cure cruelty

From the details in the passage, it is clear that currently

1. 
   average body size is expanding at the same time as package sizes are getting bigger
   
2. 
   we are eating healthier food, although we are eating more
   
3. 
   portions at fast-food restaurants are getting smaller
   
4. 
   "Supersize it" is a marketing slogan that doesn't actually mean an increase in portion size
   

3. 
   We can infer from the passage that overly large portions of healthy food
   

1. 
   can nevertheless make us gain weight
   
2. 
   are just as bad to our health as junk food
   
3. 
   are essential for our long-term health
   
4. 
   may put us off our food completely