Problem: How does the sentence end?

Robert but not Samuel was scared of marriage because 
OPTIONS:
- Robert did not have two prior marriages that failed.
- Samuel did not have two prior marriages that failed.
Answer: Samuel did not have two prior marriages that failed.

Problem: How does the sentence end?

Kenneth buys a bottle of nectar for the hummingbird feeder but Joel watches TV. 
OPTIONS:
- Kenneth is fascinated by birds.
- Joel is fascinated by birds.
Answer: Kenneth is fascinated by birds.

Problem: How does the sentence end?

Cynthia planned to adopt kids, while Natalie already had given birth to 4 children, since 
OPTIONS:
- Cynthia was fertile.
- Natalie was fertile.
Answer: Natalie was fertile.

Problem: How does the sentence end?

They struggled to feed the crowd cake at the wedding because the 
OPTIONS:
- cake was small.
- crowd was small.
Answer:
cake was small.