Sarah likes onions and Natalie does not, so 
OPTIONS:
- Sarah picked some out of their salad for dinner.
- Natalie picked some out of their salad for dinner.
Natalie picked some out of their salad for dinner.

Laura had an extremely smooth head and Felicia was always having trouble brushing out their tangles. 
OPTIONS:
- Laura  was bald.
- Felicia  was bald.
Laura  was bald.

Tanya knew much more about their neighbor than Monica because 
OPTIONS:
- Tanya was always spying on them.
- Monica was always spying on them.
Tanya was always spying on them.