Justin couldn't get the gnats out of his kitchen, so Kyle brought some insecticide. 
OPTIONS:
- Justin was well-prepared for the situation.
- Kyle was well-prepared for the situation.
Kyle was well-prepared for the situation.

Erin kept Elena awake all night because 
OPTIONS:
- Erin was a baby that just wouldn't calm down.
- Elena was a baby that just wouldn't calm down.
Erin was a baby that just wouldn't calm down.

The schedule of Elena is much more packed than Christine's. 
OPTIONS:
- Elena is a very busy person.
- Christine is a very busy person.
Elena is a very busy person.