Problem: How does the sentence end?

The computer that Jessica was using belonged to Christine, so 
OPTIONS:
- Jessica asked her to be very careful with it.
- Christine asked her to be very careful with it.
Answer: Christine asked her to be very careful with it.

Problem: How does the sentence end?

Barb wanted a party at the country club rather than the community center because the 
OPTIONS:
- club was public.
- center was public.
Answer: center was public.

Problem: How does the sentence end?

Megan had a baby whereas Katrina had a college aged child, so 
OPTIONS:
- Megan still had to change diapers.
- Katrina still had to change diapers.
Answer: Megan still had to change diapers.

Problem: How does the sentence end?

Jeffrey took the time to caulk their windows but Robert didn't bother. 
OPTIONS:
- Jeffrey saw their electric bill increase.
- Robert saw their electric bill increase.
Answer:
Robert saw their electric bill increase.