The teeth of Erin were a lot dirtier than Betty's teeth, due to 
OPTIONS:
- Erin being unhygienic.
- Betty being unhygienic.
Erin being unhygienic.

The security guard prevented Felicia from entering the arena unlike Cynthia because 
OPTIONS:
- Felicia was kicked out.
- Cynthia was kicked out.
Felicia was kicked out.

Randy liked to groom their dog regularly but Nelson did not as 
OPTIONS:
- Randy had a dog with long hair.
- Nelson had a dog with long hair.
Randy had a dog with long hair.