sentence: Erin had a more difficult time keeping their New Year's resolutions than Elena because OPTIONS:
- Erin was uncommitted.
- Elena was uncommitted.
complete: Erin was uncommitted.

sentence: The tone of the guitar was more pleasant than the sound of the piano because the OPTIONS:
- guitar was out of tune.
- piano was out of tune.
complete: piano was out of tune.

sentence: Kyle is afraid of spiders and Ryan of snakes, OPTIONS:
- Kyle saw a snake and ran in fear.
- Ryan saw a snake and ran in fear.
complete:
Ryan saw a snake and ran in fear.