Option B (It shows what the characters say) is the right response.
Explanation:
Speech bubbles, really only considered monologue balloons, conversation or word, have always been the most widely accepted way to demonstrate that which commentators say throughout comic strips, animated films but instead short stories.
A bubble something which demonstrates emotions is sometimes keep referring to someone as a fantasy world of consciousness.
The other choices made are not related to the type of situation in question. Then the above option is indeed the right one.
