Problem: How does the sentence end?

Lindsey wanted to know Carrie's process, so 
OPTIONS:
- Lindsey spent a lot of time teaching them.
- Carrie spent a lot of time teaching them.
Answer: Carrie spent a lot of time teaching them.

Problem: How does the sentence end?

Joel lived in the middle of the country while Aaron lived in a state by the coast, which made it easy for 
OPTIONS:
- Joel to visit the beach frequently.
- Aaron to visit the beach frequently.
Answer: Aaron to visit the beach frequently.

Problem: How does the sentence end?

Christopher asked Kyle to be his girlfriend last week but 
OPTIONS:
- Christopher was not happy with the answer.
- Kyle was not happy with the answer.
Answer: Christopher was not happy with the answer.

Problem: How does the sentence end?

I discovered I was allergic to beeswax so I got rid of my lip balm but not my body wash since the 
OPTIONS:
- lip balm had none of the ingredient.
- body wash had none of the ingredient.
Answer:
body wash had none of the ingredient.