Rebecca was under the car changing the oil while Laura watched, since 
OPTIONS:
- Rebecca was handy with cars.
- Laura was handy with cars.
Rebecca was handy with cars.

Eric was going fast around the track whereas Steven was waiting to quickly work on the car. 
OPTIONS:
- Eric was the pitstop mechanic.
- Steven was the pitstop mechanic.
Steven was the pitstop mechanic.

Joseph's plan was a lot worse than Donald's because 
OPTIONS:
- Joseph put almost zero thought into it.
- Donald put almost zero thought into it.
Joseph put almost zero thought into it.