sentence: He used feathers to make the bedding instead of cotton balls, because the  OPTIONS:
- cotton balls were plentiful.
- feathers were plentiful.
complete: feathers were plentiful.

sentence: Brett knew how to take care of a kitten better than Neil because  OPTIONS:
- Brett was a cat person.
- Neil was a cat person.
complete: Brett was a cat person.

sentence: Robert was a very well regarded professor but Lawrence was not.  OPTIONS:
- Robert was unable to make tenure at their university.
- Lawrence was unable to make tenure at their university.
complete:
Lawrence was unable to make tenure at their university.