Which statement describes the results of research by Dweck on children's beliefs about intelligence? 

Children who believe that intelligence is a fixed entity are more likely than other children to persist in the face of difficulty. 

Children who believe that intelligence can be increased by learning are more likely than other children to say they are dumb when faced with a challenge. 

Children who believe that intelligence is a fixed entity are more likely than other children to think that a very challenging problem is too hard for them.

Children who believe that intelligence can be decreased are more likely than other children to quit trying at challenging tasks.