Penguins tend to stay on land to avoid killer whales, because they cannot go on land.

Who is "they" in this prior sentence?
OPTIONS:
- Penguins
- killer whales
killer whales
The zombies chased the survivors because they were tasty.

Who is "they" in this prior sentence?
OPTIONS:
- The zombies
- the survivors
the survivors
The mother encouraged her daughter to sing a difficult song so she would be challenged.

Who is "she" in this prior sentence?
OPTIONS:
- The mother
- her daughter

her daughter