B either or judgement, the person is stating that anyone who is not with them is against him therefor making it an either or statement
The pronoun that complete the elliptical cause is "I" because sentence uses the word "My" in the very beginning of the sentence so that person is either talking for themselves or someone else, if for someone else than a name would be in The list of answers.
The correct answer is “it’s” because it combines it is
