Problem: How does the sentence end?

Robert was teaching Randy to crochet a scarf so 
OPTIONS:
- Robert could make a gift for their daughter.
- Randy could make a gift for their daughter.
Answer: Randy could make a gift for their daughter.

Problem: How does the sentence end?

While walking with Dennis, Kenneth got their arm infected by poison ivy so 
OPTIONS:
- Dennis gave them some cream.
- Kenneth gave them some cream.
Answer: Dennis gave them some cream.

Problem: How does the sentence end?

Sadie had a plan to save enough money to replace her bike with a new car, but she quickly found keeping the 
OPTIONS:
- bike was more expensive to take to work.
- car was more expensive to take to work.
Answer: car was more expensive to take to work.

Problem: How does the sentence end?

The glasses were thicker than the contact lenses and that made the 
OPTIONS:
- glasses more transparent.
- contact lenses more transparent.
Answer:
contact lenses more transparent.