参考答案

正确答案：C
解析：本题也是推论题。题目问：Ames对于加州65号议案的态度是什么?文章第六段结尾的句子“The campaign supporting California's Proposition 65 convinced Ames that he had a duty to explain this to the public”的意思是：这项议案使Ames确信他有义务向公众解释为什么天然致癌物质比人工致癌物质更有害。而文章的第七段说“Some people assume Ames is a stooge for the chemical industry, which he is not, He does no consulting for the chemical, drug or food companies, or for law firms. And he accepted no grants from business”的意思是Ames既没有收取咨询费也没有获取商业报酬，凭什么他得作出解释?所以在四个选项A(观望的)、B(不发表评论的)、C(批评的)、D(恭敬的)中，C项最为合适。