Answer:
Fortunato's dress foreshadows his being a fool or buffoon.
Explanation:
Edgar Allen Poe's short story "The Cask of Amontillado" is about Montresor's revenge on Fortunato, who had insulted him many times. The story deals with themes of revenge, friendship, appearance and reality, sin, etc.
In the given excerpt from the story, Montresor describes Fortunato's dress when he first met him that carnival night. He revealed that "[Fortunato] wore motley . . . had on a tight-fitting parti-striped dress, and his head was surmounted by the conical cap and bells." "Motley" refers to the multicolored suit worn by clowns, which seems to foreshadow the character of Fortunato as a buffoon or a fool.
Thus, the correct answer is the first option.