Question

read the excerpt from \the adventure of the mysterious picture.\ how was this vile nervous fit, for such i now persuaded myself it was, to be conquered? i determined to force myself not to look at the painting but to undress quickly and get into bed. i began to undress, but in spite of every effort i could not keep myself from stealing a glance every now and then at the picture; and a glance was now sufficient to distress me. even when my back was turned to it, the idea of this strange face behind me, peering over my shoulder, was insufferable. how does the excerpt exemplify gothic fiction? by revealing an unhinged psychological state by describing a scene of blood and gore by depicting the triumph of reason over the irrational by illustrating the confused plans of the narrator

Explanation:

Gothic fiction often explores psychological states like fear and unease. The narrator's nervous fit, inability to avoid looking at the painting, and distress (even when back - turned) show an unhinged psychological state. There's no blood/gore (eliminating that option). The narrator isn't showing triumph of reason (they can't stop looking at the painting). The focus isn't on confused plans but on the psychological reaction.

Answer:

by revealing an unhinged psychological state