[Q]: How does the sentence end?

Since Laura liked fish while Natalie was a cat lover, 
OPTIONS:
- Laura was often cleaning an aquarium.
- Natalie was often cleaning an aquarium.

[A]: Laura was often cleaning an aquarium.
QUES: Continue writing.

At the paint store this morning, Emily asked Rachel what color 

OPTIONS:
- Emily wants to choose for the kitchen.
- Rachel wants to choose for the kitchen.
+++++++++
ANS: Rachel wants to choose for the kitchen.
Problem: How does the sentence end?

He used a red marker to color the paper until the 
OPTIONS:
- marker was completely covered.
- paper was completely covered.
Answer: paper was completely covered.
sentence: Elena is better at parallel parking than Kayla is even though  OPTIONS:
- Elena lives in the city.
- Kayla lives in the city.
complete: Kayla lives in the city.
Aaron worried college was too expensive and he wouldn't be able to finish it but Matthew disagreed, 
OPTIONS:
- Aaron had a hard time explaining why.
- Matthew had a hard time explaining why.
Matthew had a hard time explaining why.
Problem: Continue the following story.

Neil went to the humane society and adopted a dog unlike Nick because 
OPTIONS:
- Neil disliked animals.
- Nick disliked animals.
Here's how I want to continue it:
Nick disliked animals.