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59.(  )

Why do dogs wear a guilty look according to the researchers?

• A、To attract their owners
  
  

• B、To deceive ther owners.
  
  

• C、To beg their owners for treats.
  
  

• D、To show obediene to their owers.
  
  

What do Teitel' s words in the last paragraph imply?

• A、The tortoises were fond of seeing Earthrise.
  
  

• B、The tortoises were not given due credit for their experience.
  
  

• C、The tortoises were not named after the Soviet spacecraft.
  
  

• D、The tortoises were famous all over the world.