Problem: How does the sentence end?

Robert was a bit insensitive, so he didn't advocate well for his patients, unlike Leslie, who was more compassionate. 
OPTIONS:
- Robert just had the wrong temperament for the job.
- Leslie just had the wrong temperament for the job.
Answer: Robert just had the wrong temperament for the job.

Problem: How does the sentence end?

The floor looked better with the carpet than with the mat, because the 
OPTIONS:
- carpet was clashing.
- mat was clashing.
Answer: mat was clashing.

Problem: How does the sentence end?

Christopher is sleeping at Kyle's house so he wants to make a sofa slipcover, because 
OPTIONS:
- Christopher wants to be comfortable.
- Kyle wants to be comfortable.
Answer: Christopher wants to be comfortable.

Problem: How does the sentence end?

John emptied the content of the box into the jar and it cannot contain it. The 
OPTIONS:
- box is big.
- jar is big.
Answer:
box is big.