[Q]: How does the sentence end?

Since Elena was a homeowner and Erin lived in an apartment, 
OPTIONS:
- Elena rented their place of residence.
- Erin rented their place of residence.

[A]: Erin rented their place of residence.
QUES: Continue writing.

Steven grew up in a richer neighborhood than Jeffrey, so 

OPTIONS:
- Steven was unaware of not feeling safe in the dark.
- Jeffrey was unaware of not feeling safe in the dark.
+++++++++
ANS: Steven was unaware of not feeling safe in the dark.
Problem: How does the sentence end?

Kenneth has more litter boxes in their house than Nelson because 
OPTIONS:
- Kenneth is just not a cat person.
- Nelson is just not a cat person.
Answer: Nelson is just not a cat person.
sentence: The marathon gave Sarah sore muscles, but Elena felt invigorated.  OPTIONS:
- Sarah had always loved running.
- Elena had always loved running.
complete: Elena had always loved running.
Jason was bad with girls, so he asked Hunter for advice. 
OPTIONS:
- Jason was a loser.
- Hunter was a loser.
Jason was a loser.
Problem: Continue the following story.

Emily would smile in all the photographs but not Christine because 
OPTIONS:
- Emily had crooked teeth.
- Christine had crooked teeth.
Here's how I want to continue it:
Christine had crooked teeth.