Section: Writing: Sentence Correction

64) The final two competitors were Susan, that was considered the challenger, and Gail, the defending champion.

1. Susan, that was considered the challenger,
2. Susan, whom was considered the challenger,
3. Susan, which was considered the challenger,
4. Susan, considered the challenger,
5. Susan, who was considered the challenger,

Susan is a person, so the appropriate pronoun is who.