【正确答案】问答
   Candidate A: When we talk about the movie rating system, most researchers would claim that it is useless. But in my opinion, it does help. As the saying goes, something is better than nothing. Although not all parents know about the rating system and they might mistake some movies as appropriate for children, it does help a lot of parents make a decision about whether a movie is suitable for their children or not.
   Candidate B: I don't think the rating system helps. "Smoking is harmful to health." is printed on the cover of every pack of cigarettes, but people still smoke. Although the cause-and-effect relationship is, so far, not that clear and direct, the research results are still significant, because it at least reveals the possibility between the phenomenon and the consequence. The negative influence of movie violence shouldn't be ignored.