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 does the author want to imply in this passage?

• A、Going vegan consumes more water and gain.
  
  

• B、Going vegan enables people to live a healthier life.
  
  

• C、Going vegan helps to develop meat industry
  
  

• D、Going vegan has been a lifestyle for the majorities.
  
  

60.(  )