Nick decided to leave the band, while Eric remained, because
OPTIONS:
- Nick was happy with the other members.
- Eric was happy with the other members.
Eric was happy with the other members.

Donald's cat is more well behaved than Aaron's because
OPTIONS:
- Donald takes a lot better care of his.
- Aaron takes a lot better care of his.
Donald takes a lot better care of his.

Jennifer was a popular member of a high-school clique while Samantha preferred to keep only few friends.
OPTIONS:
- Jennifer was more introverted.
- Samantha was more introverted.
Samantha was more introverted.