Which feature of Gothic writing does this passage from Herman Melville's Moby-Di. ck best illustrate?

If such a furious trope may stand, his special lunacy
stormed his general sanity, and carried it, and turned all its
concentred cannon upon its own mad mark; so that far
from having lost his strength, Ahab, to that one end, did
now possess a thousand fold more potency than ever he
had sanely brought to bear upon any one reasonable
object.

A. Death

B. Feelings of guilt

C. Mystery and suspense

D. Insanity