A-"'Come," I said, with decision, 'we will go back; your health is precious.'"
Explanation:
Despite the obvious hate and contempt that Montresor held for Fortunato, he knew that by appealing to his vanity he would be able to coerce him into the catacombs (that doubled as a wine cellar). Complimenting him, talking about his health and building up suspense were the ways Montresor made Fortunato fall in his hands.
This story is called "The Cask of Amontillado" and it was written by Edgar Allan Poe. The story is about an old man who kills another man. According to the question, Montresor's true intentions isn't good because he wants to kill Fortunato while he is entertained with the Amontillado. Montresor's thought is to intoxicate Fortunato with wine. So the true intentions of Montresor are showed in letter "C" that says "With these materials and with the aid of my trowel, I began vigorously to wall up the entrance of the niche."