Tom asked his son to drive so that he could sleep.

Who is "he" in this prior sentence?
OPTIONS:
- Tom
- his son
Tom
Lucas is younger than Claus because he was born first.

Who is "he" in this prior sentence?
OPTIONS:
- Lucas
- Claus
Claus
Brock understood the material better than Tracy because he was not paying attention.

Who is "he" in this prior sentence?
OPTIONS:
- Brock
- Tracy
Tracy