Problem: How does the sentence end?

we replaced the cement surface in the bedroom with wood because the 
OPTIONS:
- cement was warm.
- wood was warm.
Answer: wood was warm.
sentence: The group of people decided to make a band instead of a sports team, since the  OPTIONS:
- band was relaxed.
- team was relaxed.
complete: band was relaxed.
It was possible for Leslie to buy a Rolls Royce but not for Christopher because 
OPTIONS:
- Leslie was very poor.
- Christopher was very poor.
Christopher was very poor.
Input: Continue writing.

Cynthia had a cold. Tanya did not want to catch it. 
OPTIONS:
- Cynthia avoided being in the same room.
- Tanya avoided being in the same room.

Continued: Tanya avoided being in the same room.
Story needs to be completed:
The apple would rot in the kitchen but stayed fresh in the basement, as the 
OPTIONS:
- kitchen failed to preserve it.
- basement failed to preserve it.

My choice:
kitchen failed to preserve it.
Problem: How does the sentence end?

The customer bought the chair instead of the stool because the 
OPTIONS:
- stool was very stained.
- chair was very stained.
Answer:
stool was very stained.