Problem: How does the sentence end?

Justin gave their heartfelt congratulations to Christopher after 
OPTIONS:
- Justin managed to win a major sports tournament.
- Christopher managed to win a major sports tournament.
Answer: Christopher managed to win a major sports tournament.

Problem: How does the sentence end?

Aaron asked to borrow money from Steven because 
OPTIONS:
- Aaron  remembered to bring their wallet with them.
- Steven  remembered to bring their wallet with them.
Answer: Steven  remembered to bring their wallet with them.

Problem: How does the sentence end?

The belly button of Christopher has lint in it, while Matthew's has none, so 
OPTIONS:
- Christopher is the filthier person.
- Matthew is the filthier person.
Answer: Christopher is the filthier person.

Problem: How does the sentence end?

Justin was a little dwarf compared to Ian because 
OPTIONS:
- Justin was so short in stature.
- Ian was so short in stature.
Answer:
Justin was so short in stature.