Problem: How does the sentence end?

Sleeping with a quilt was more suited for Kenneth than Jeffrey because 
OPTIONS:
- Kenneth lived in a colder place.
- Jeffrey lived in a colder place.
Answer: Kenneth lived in a colder place.

Problem: How does the sentence end?

Christine had to care for Samantha after their health declined since 
OPTIONS:
- Christine was rather ill most of the time.
- Samantha was rather ill most of the time.
Answer: Samantha was rather ill most of the time.

Problem: How does the sentence end?

Children often thought Elena was intimidating but found Erin calming, since 
OPTIONS:
- Elena had a very loud voice.
- Erin had a very loud voice.
Answer: Elena had a very loud voice.

Problem: How does the sentence end?

The eggs were able to reflect the light and not the glasses since the 
OPTIONS:
- eggs are dark colored.
- glasses are dark colored.
Answer:
glasses are dark colored.