Concept:Emphatic stress is used to contrast the stressed word with another word in a yes/no question.Explanation:The word written in capital letters is "DISHONEST".This shows the speaker is correcting the quality mentioned earlier.The person and action remain unchanged: "the principal punished the students".So the earlier question must contain the opposite quality, "sincere", not a different person or action.Check the options: only option C asks about "sincere" while keeping "principal", "punished", and "students" the same.The given sentence therefore responds to that question by saying "No, it was for being dishonest."Answer:C. Did the principal punish the students for being sincere?