Problem: How does the sentence end?

Doctor gave some medicine to Betty but gave none to Tanya as 
OPTIONS:
- Betty was showing none of the symptoms of illness.
- Tanya was showing none of the symptoms of illness.
Answer: Tanya was showing none of the symptoms of illness.

Problem: How does the sentence end?

The parents of Joel forgot to pick them up from school but the parents of Eric were on time. 
OPTIONS:
- Joel was standing alone at the school.
- Eric was standing alone at the school.
Answer: Joel was standing alone at the school.

Problem: How does the sentence end?

Lindsey was not known to recycle at all compared to Christine, since 
OPTIONS:
- Lindsey neglected the environment.
- Christine neglected the environment.
Answer: Lindsey neglected the environment.

Problem: How does the sentence end?

At school on Monday, Adam put the book in his backpack instead of the locker because the 
OPTIONS:
- locker was too full.
- backpack was too full.
Answer:
locker was too full.