A. Because dogs leave people alone. Because dogs like to be with people. C. Because dogs are willing to do things for people. D. Because all dogs, including wild dogs, are friendly.
A. Because dogs are friendly by nature. Because humans are friendly to them. C. Because dogs like to be taught how to do things. D. Because humans bred wild dogs into friendly ones.
A. Cats choose humans. B. Cats care if humans are happy. Cats refuse to come near humans. D. Cats are interested in learning things.
A. Cats want to be close to humans. B. Cats want to make humans happy. C. Dogs regard humans as their equals. Dogs regard humans as their masters.
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