Problem: How does the sentence end?

Rebecca wanted to change names and Carrie didn't approve because 
OPTIONS:
- Rebecca thought it was a dated name.
- Carrie thought it was a dated name.
Answer: Carrie thought it was a dated name.

Problem: How does the sentence end?

Carrie callously slammed Rachel's head into the headboard, since 
OPTIONS:
- Carrie was much weaker than them.
- Rachel was much weaker than them.
Answer: Rachel was much weaker than them.

Problem: How does the sentence end?

When I have a health concern I go to the doctor's office, not to an unlicensed medical website, because the 
OPTIONS:
- website can be frightening.
- doctor's office can be frightening.
Answer: website can be frightening.

Problem: How does the sentence end?

The American couple went through a breakup after the argument because the 
OPTIONS:
- argument was reasonable.
- breakup was reasonable.
Answer:
breakup was reasonable.