Problem: How does the sentence end?

The much needed supplies were bought by Donald but not Justin because 
OPTIONS:
- Donald was a richer person.
- Justin was a richer person.
Answer: Donald was a richer person.

Problem: How does the sentence end?

The playful kitten came bounding up to Craig but not Ian because 
OPTIONS:
- Craig had a cat toy to play with.
- Ian had a cat toy to play with.
Answer: Craig had a cat toy to play with.

Problem: How does the sentence end?

Ian climbed the tree but could not convince Steven to join because 
OPTIONS:
- Ian was scared of heights.
- Steven was scared of heights.
Answer: Steven was scared of heights.

Problem: How does the sentence end?

Emily can go a long time without visiting a bathroom but Jessica cannot because 
OPTIONS:
- Emily has a large bladder.
- Jessica has a large bladder.
Answer:
Emily has a large bladder.