Answer:
explanation
Step-by-step explanation:
id like to think its montresors fault; he was the one who planned the entire scheme as it is. over time montresor learned fortunatos weakness (pride in wine) and used that weakness against him. fortunato in the story is entirely unaware that montresor has planned revenge and is going to kill him, so he fell for his trap unknowingly. its also montresors fault for letting him get more and more drunk when they were in the catacombs, along with not forcing him to leave when he found out about his cold (he gave him the option to leave multiple times, but didnt actually force him out of there)
i hope this helps ^^ im not good at short responses but thats what i think~