Which feature of gothic writing does this passage from edgar allan poe’s “the raven” most illustrate?

“and the silken sad uncertain rustling of each purple curtain thrilled me - filled me with fantastic terrors never felt before
deep into the darkness peering , long i stood there wondering, fearing,
doubting, dreaming dreams no mortals sever dared to dream before

a. human madness
b. emotions of guilt
c. nature’s power
d. death and mortality