Answer:
D. Decline of something that was once good
Explanation:
Gothic is a style of fiction characterized by the portray of dark and romantic themes and settings that include places like medieval castles, haunted or mysterious houses that are desolate, apparently abandoned, or in decay, as if there had been once good but now they are in decline, and now they are surrounded by a macabre and mysterious atmosphere that makes the reader unease and at suspense.
Mountain regions, ominous climatic conditions, and threatening storms are often familiar in this type of fiction, as well as violent and mysterious incidents that seem supernatural, intense emotions, romance, curses, and prophecies.