B) The narrator wants his Fortunato to feel superior.
The goal of this story is to boost Fortunato's ego and make him feel like he would be the only one trusted to judge the quality of Amontillado. By playing with Fortunato's ego, the narrator is guaranteeing that Fortunato will follow him down into the catacombs without hesitation. Throughout the story, Montressor feeds Fortunato's ego and pretends to care about Fortunato's health. All these "concerns" are really tricks to get Fortunato to trust him and not go back up to the party.