<span>This is foreshadowing that Fortunado will not leave the vaults (C). He has become nervous about Montressor's actions and has suggested that they leave, hoping that this is all a joke. But Montressor uses verbal irony to indicate that only he will be leaving, and Fortunado will remain entombed for the insults he supposedly dealt Montressor previous to the beginning of the narrative.
The second question, though it doesn't have all the multiple choice options available, suggests that Montressor is trying to flatter Fortunado to pique his interests in going down to the catacombs, even during this festival. He is playing to Fortunado's ego as a wine connoisseur.</span>
