单项选择题A. Whether it is necessary to put labels on prepared foods. B. What ingredient should a nutrition label list. C. How to get consumers to read labels more carefully. D. What food information should be provided to consumers.

单项选择题A. Postpone his favorite course to the next semester. B. Ask the professor to help him choose other courses. C. Request permission to take the courses together. D. Take the course from a different professor.