Emphatic stress is the placement of greater stress on a particulate word in a sentence for clarification or emphasis. The question requires you to select the question that incites the response given. The word "bread" is emphasised in the response, and so you are to look for an option that has a word that is different from "bread". The answer is option D because the emphatic stress on BREAD contrasts with cake in the question, thereby validating and emphasizing the word BREAD in the response.