Nelson was inside the teepee, while Jason stayed outside, so 
OPTIONS:
- Nelson ended up getting drenched in the rainstorm.
- Jason ended up getting drenched in the rainstorm.
Jason ended up getting drenched in the rainstorm.

Cynthia got a much better score on their math test than Rebecca. 
OPTIONS:
- Cynthia didn't take the time to study for it.
- Rebecca didn't take the time to study for it.
Rebecca didn't take the time to study for it.

Since Aaron was motivated to study for the exam while Donald was lazy, 
OPTIONS:
- Aaron received a higher score on the test.
- Donald received a higher score on the test.
Aaron received a higher score on the test.