The neighbor has to be the antagonist, because the protagonist loved his dog very much and his neighbor killed his dog, the protagonist even called his neighbor evil, so I would go with C, the neighbor.
Montresor tells all of his servants that they must stay in the house. He also tells him that he is going out and will not return until much later. Since the story takes place during a popular festival, the servants want to leave and join the partying. Montresor knows that if he tells the servants he won't be back for a while the servants will leave the house anyways. Since he is not there to make sure that they are doing what he's asked, the servants will go off and do whatever they want.
An epic hero is a man whose fortune is brought about by his own characteristics. These characteristics are usually strength, loyalty, courage, and intelligence.
Odysseus is a clear example of an epic hero because he demonstrates courage and intelligence. For example, in the Cyclops' cave, all his men were afraid and panicked, but not him. He kept calm and confronted the Cyclops. Then, when it asked for his name, he said it was "Nobody", so when he stabbed the Cyclops eye, which is another display of immense courage, he could not say who did it.