Randall Allen argues that the school's lunch period should be lengthened by 10 minutes because this would allow better food digestion, lessen student stress, and strengthen student participation in afternoon classes. What is most likely the author's purpose for writing this text? A. To inform readers of the problems that commonly occur during school lunch periods B. To entertain readers with a personal story about a school lunch experience C. To inform readers about the effects of food on student performance D. To convince readers that a longer lunch period is needed and beneficial