Kai began the research process by asking, “How does playing a musical instrument improve academic performance?” Now, he needs to modify his major research question as a result of his research. Which question narrows the focus of his research?

Coming to school each day, having the necessary materials, and to do homework students to be successful in school. choose the answer that is the most effective substitute for the underlined part of the sentence. if no substitute is necessary, choose ‘leave as is.’ a) leave as is. b) coming to school each day, have the necessary materials, and do homework c) come to school each day, having the necessary materials, and to do homework d) coming to school each day, having the necessary materials, and doing homework