Problem: How does the sentence end?

Megan has to take more medication than Sarah because 
OPTIONS:
- Megan suffers from several medical conditions.
- Sarah suffers from several medical conditions.
Answer: Megan suffers from several medical conditions.

Problem: How does the sentence end?

The man chose to sit in the chair rather than the sofa because the 
OPTIONS:
- chair looked more comfortable.
- sofa looked more comfortable.
Answer: chair looked more comfortable.

Problem: How does the sentence end?

I liked doing yoga on the mat more than on the floor because the 
OPTIONS:
- floor was hard.
- mat was hard.
Answer: floor was hard.

Problem: How does the sentence end?

We could negotiate the prices, but could not do so with the terms, as the 
OPTIONS:
- prices were fixed.
- terms were fixed.
Answer:
terms were fixed.