Psychologists suggest that to cure cruelty

The passage tells us that the Pyrenees

1. 
   provided easy access for Spain's enemies, making her vulnerable to attacks
   
2. 
   are for the most part lower than the Alps
   
3. 
   were first explored by the American historian Will Durant
   
4. 
   kept Spain safe from her enemies, but made it difficult for her to develop
   

2. 
   According to the passage, no other mountain range in Europe
   

1. 
   has prevented passage and access as much as the Pyrenees
   
2. 
   extends as far as the Pyrenees
   
3. 
   has been the scene of battle as many times as the Pyrenees
   
4. 
   has so many high peaks as the Pyrenees
   

3.