I will answer it but i need to see the rest of the essay to write a relevant question that will fit in your essay
I say C because all the other ones sounds right
Person who is opposed to, struggles against, or competes with another; opponent; adversary. the adversary of the hero or protagonist of a drama or other literary work: Iago isthe antagonist of Othello.
This is false. A narrative/story is mainly written to entertain.