单选题 Hu added that some of the mistrust prevalent in society today stems from previous cases where people who stepped in to offer assistance were later accused of having caused the original accidents.
【正确答案】 A
【答案解析】解析：句意：胡又说当今社会普遍存在的一些信任危机源于先前出现过的出手相救反而被控告为肇事者的几个事件。prevalent“普遍的，广传的”，A与B都有“流行的”意思，但是prevailing指某一现象或事物占优势，普遍或盛行，而popular指某物受大众欢迎，所以prevailing更接近句中的prevalent，故A为答案。contaminating“受到污染的”；shuffling“支吾的，慢慢移动的”。