Problem: How does the sentence end?

The shirt was in the cardboard box and the book was sitting on top of it when it rained, so the 
OPTIONS:
- book got wet.
- shirt got wet.
Answer: book got wet.

Problem: How does the sentence end?

The kitchen of Kayla was a lot worse than that of Erin, due to 
OPTIONS:
- Kayla having more money.
- Erin having more money.
Answer: Erin having more money.

Problem: How does the sentence end?

Monica was better during her recital than Carrie because 
OPTIONS:
- Monica did not spend her weekends practicing on the piano.
- Carrie did not spend her weekends practicing on the piano.
Answer: Carrie did not spend her weekends practicing on the piano.

Problem: How does the sentence end?

Kenneth has a harder time finding high paying jobs than Matthew because 
OPTIONS:
- Kenneth doesn't have a college degree.
- Matthew doesn't have a college degree.
Answer:
Kenneth doesn't have a college degree.