第25题: [单项选择]Which of the following is mentioned by the author as a reason why the baleen whale population has been reduced A. Increased pollution of the seas. B. Hunting. C. Insufficient supply of food. D. Disease. 参考答案:B 答案解析:文章第二段中“Though reduced by hunting…”一句告诉我们此种鲸变少的原因在于捕杀,因此选B。