I think the answer is tone hopefully
I believe the answer is B:
B = Comic Book
Reason:
Film is that actual word that can be used to be a medium of a story. Film also referencing to movie, motion picture, or moving picture, is a visual art-form used to stimulate experiences that communicate ideas, stories, perceptions, feelings, beauty, or atmosphere through the use of moving images.
So Comic Book would coordinate with that.
Subject. because you cant have a sentence without a subject<span />