单选题
Which group of people make some efforts to help pupils in elementary schools?
【正确答案】
D
【答案解析】文章的倒数第五行有这么一句：“Thus，the small efforts of the man--the seniors--complement the large efforts of the few--the teachers．”结合上文，说的是小学请来年长者作为顾问，所以是年长者努力帮助小学生，故选D。