Problem: How does the sentence end?

Michael didn't have nearly the amount of creativity as Nelson, which is why 
OPTIONS:
- Michael succeeded at becoming an artist.
- Nelson succeeded at becoming an artist.
Answer: Nelson succeeded at becoming an artist.

Problem: How does the sentence end?

The rock was more special than the stone because the 
OPTIONS:
- rock was from a unique area on the mountain.
- stone was from a unique area on the mountain.
Answer: rock was from a unique area on the mountain.

Problem: How does the sentence end?

Katrina showed their large aquarium to Cynthia since 
OPTIONS:
- Katrina had owned one for a long time.
- Cynthia had owned one for a long time.
Answer: Katrina had owned one for a long time.

Problem: How does the sentence end?

The film amused Rebecca the whole way through but not Mary because 
OPTIONS:
- Rebecca was laughing the whole time.
- Mary was laughing the whole time.
Answer:
Rebecca was laughing the whole time.