III. Mark the letter A, B, C, or D to indicate the sentence that best combines each pair of sentences given.Câu hỏi The principal has made one simple request to all the school's students. The request is to leave cell phones at home. A. The principal has made one simple request to all the school's students that they leave cell phones at home. B. The principal has made one simple request to all the school's students to make sure that they leave cell phones at home. C. The principle made all the school's students at a request of leaving their cell phones at home. D. There has been a request made by the principal that all the school's students leave their cell phones at home.