Answer: C) You, them.
Explanation for this question is being written.
Answer: B) I (subject pronoun) should changed to me (object pronoun).
Answer: A) It
Answer: C) Her
Answer: C) Nominative
Answer: A) Them
Answer: C) The teacher gave bonus points to we.
Answer: C) Us
Answer: A) She
Answer: B) They
Answer: A) Nominative
Answer: A) True
Answer: A) Who
Answer: D) Us
Answer: A) Nominative (aka subjective).
Answer: C) Them
Answer: A) Who/whom
Answer: A) Him
Answer: A) Objective
Answer: D) Me
Answer: B) It
Answer: B) Whom
Answer: B) My mom and I went to the zoo.
Answer: B) Theirs
Answer: B) Objective
Answer: A) She helps me.
Answer: B) Direct object.
Answer: B) Me
Answer: D) You
Answer: A) Incorrect pronoun case.
Answer: B) Him
Answer: A) They / them.
Answer: A) We
Answer: C) We to buy.
Answer: A) I
Answer: A) TRUE
Answer: B) Change I to me.
Answer: D) I
Answer: B) Sandy and I.
Answer: C) Me
Answer: B) B
Answer: B) The winner was him.
Answer: B) 3
Answer: B) Change he to him.
Answer: C) He and I finished the project.
Answer: B) She always responds "this is she.".
Answer: D) It
Answer: B) Them/him