Problem: How does the sentence end?

Since Tom heard a noise when he applied the brake, he decided to fix the caliper rather than the rotor, because the 
OPTIONS:
- caliper was silent.
- rotor was silent.
Answer: rotor was silent.

Problem: How does the sentence end?

Joan decided to swap the old gemstone in her ring for a new gemstone because the 
OPTIONS:
- new gemstone was uglier.
- old gemstone was uglier.
Answer: old gemstone was uglier.

Problem: How does the sentence end?

Leslie carried an oxygen tank while working and Hunter did not because 
OPTIONS:
- Leslie was a paramedic.
- Hunter was a paramedic.
Answer: Leslie was a paramedic.

Problem: How does the sentence end?

Being called for jury duty bothered Joel but not Leslie, as 
OPTIONS:
- Joel felt it was a waste of their time.
- Leslie felt it was a waste of their time.
Answer:
Joel felt it was a waste of their time.