試題詳解

35 For decades, childhood obesity rates have been on the rise. Now some U.S. cities are seeing progress in their fight against fat. In those cities, fried food has disappeared from many cafeteria menus in schools. Whole-wheat bread has replaced white bread. Drinks like water and low-fat milk have replaced sugary beverages. Many schools have also required healthier snack options in vending machines. It can be inferred that obesity rates fall in cities where _____.
(A) prices for healthy food drop
(B) schools provide healthy food choices
(C) food labels offer nutritional information
(D) students are required to exercise regularly