Problem: How does the sentence end?

I poured the shampoo into a bottle, but it all didn't fit because the 
OPTIONS:
- shampoo was too small.
- bottle was too small.
Answer: bottle was too small.

Problem: How does the sentence end?

Kevin was a much worse baseball player than Christopher because 
OPTIONS:
- Kevin had control over the ball.
- Christopher had control over the ball.
Answer: Christopher had control over the ball.

Problem: How does the sentence end?

It was enjoyable for Monica to explore new places but Christine avoided it, since 
OPTIONS:
- Monica was curious about new things.
- Christine was curious about new things.
Answer: Monica was curious about new things.

Problem: How does the sentence end?

Elena considered Samantha to be a master in scrabble although  
OPTIONS:
- Elena had won fewer games.
- Samantha had won fewer games.
Answer:
Samantha had won fewer games.