题目

You've seen people in need on the news after a hurricane, an earthquake, or any other disaster. Perhaps you've walked past homeless people who are living on the streets. Or maybe you've been to an animal shelter and wished you could give every pet a home. So what can you do to help people or animals who need it? The answer is —being a volunteer! Volunteering means spending some of your free time helping others. You may volunteer to help other people, such as the families who lost their homes after a natural disaster. But you can also volunteer to protect animals, the environment, or 为了解某中学生遵守《中华人民共和国交通安全法》的情况，调查部门在该校进行了如下的随机调查，向被调查者提出两个问题：（1）你的学号是奇数吗？（2）在过路口时你是否闯过红灯？要求被调查者背对着调查人员抛掷一枚硬币，如果出现正面，就回答第一个问题，否则就回答第二个问题．被调查者不必告诉调查人员自己回答的是哪一个问题，只需回答“是”或“不是”，因为只有调查者本人知道回答了哪一个问题，所以都如实地做了回答．结果被调查的800人（学号从1至800）中有240人回答了“是”．由此可以估计这800人中闯过红灯的人数是（ ）A．40人B．80人C．160人D．200人