Problem: How does the sentence end?

Eric would go out on many dates while Ryan was happier with one person, so 
OPTIONS:
- Eric looked less promiscuous.
- Ryan looked less promiscuous.
Answer: Ryan looked less promiscuous.

Problem: How does the sentence end?

When growing crystals for science class, Katrina's crystal was bigger than Rebecca's so 
OPTIONS:
- Katrina was happy.
- Rebecca was happy.
Answer: Katrina was happy.

Problem: How does the sentence end?

Ryan was practicing polyamory but Lawrence did not so 
OPTIONS:
- Ryan was intimate with one person.
- Lawrence was intimate with one person.
Answer: Lawrence was intimate with one person.

Problem: How does the sentence end?

Playing an electric guitar came easy to Victoria but not Patricia because 
OPTIONS:
- Victoria had few months of experience.
- Patricia had few months of experience.
Answer:
Patricia had few months of experience.