Montressor is angry with fortunato because he feels that fortunato has insulted him. Earlier in the story montressor says "The thousand injuries of Fortunato I had borne as I best could; but when he ventured upon insult, I vowed revenge." We are never really shown what actually made Montessori think this but observing montressor himself he is easily insulted and narcissistic in a way. Montressor wants to keep his plan as secret as possible so he decides to use fortunato s best wine against him. Montressor tricks fortunato into thinking that he has something that could pass for the amontillado. Fortunato quickly gets excited and interested which is perfect for montressor s plan. Fortunato insist that he must try the amantilldo so they go to the montressor s vault where montressor kills fortunato at last.
because giving them lower grades can decrease their confidence in how they did but if you give them feedback they can see how they can improve themselves