Problem: How does the sentence end?

Amy was silent during the debate but Monica said a lot because 
OPTIONS:
- Amy was very shy.
- Monica was very shy.
Answer: Amy was very shy.
sentence: Victoria always came first or second when they participated in track but Mary usually came last because  OPTIONS:
- Victoria was a slow runner.
- Mary was a slow runner.
complete: Mary was a slow runner.
The kids were excited to leave school to go to the party because the 
OPTIONS:
- party was fun.
- school was fun.
party was fun.
Input: Continue writing.

The dog preferred sleeping on the couch instead of the dog bed because the 
OPTIONS:
- couch was closer to his food.
- bed was closer to his food.

Continued: couch was closer to his food.
Story needs to be completed:
Jennifer was a hoarder while Lindsey had very few personal items, so 
OPTIONS:
- Jennifer took up most of their storage space.
- Lindsey took up most of their storage space.

My choice:
Jennifer took up most of their storage space.
Problem: How does the sentence end?

Rebecca liked talking to Katrina about her newborn baby since 
OPTIONS:
- Rebecca was an inexperienced mother.
- Katrina was an inexperienced mother.
Answer:
Rebecca was an inexperienced mother.