The answer is B. Metaphore
Here is why:
a figure of speech in which a word or phrase is applied to an object or action to which it is not literally applicable.
"“I had fallen through a trapdoor of depression,”
Answer:
me myself.................
This is in third person PoV (likely omniscient to be precise). This is known because the readers know almost every thought and emotion of each character.
Examples of this are provided throughout. Just find quotes about the character's thoughts/feelings. :)
The word that you are missing is MUCH.