T1W3 TS Q12 – Selective High School

A well-behaved dog does not get anxious when left alone and is friendly towards people and other dogs.

If this is true, which of the below sentences must be true?

Rover chews up the couch whenever I'm away for more than twenty minutes. Heis a great dog. Rover gets very protective and snaps whenever someone new approaches. He is a great guard dog. Rover never barks at other dogs. He is a well-behaved dog. Rover can control himself whenever he is alone, with people, or with other dogs. He is a well-behaved dog.

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If this is true, which of the below sentences must be true?