Which research question would lead to the best viewpoints on whether or not junk food should be banned on high school campuses?
A. What does medical research show about the advantages of removing junk food from high school campuses?
B. What are some ways that high school campuses could improve the quality of cafeteria food?
C. What opinions do high school principals have regarding the sale of junk food on school campuses?
D. What is the average amount of money high school students spend on junk food at school each day?