(单选题)

Why were the 10 people chosen for the experiment?

A.Their lifestyles were typical of ordinary people.

B.Their lack of exercise led to overweight.

C.They could walk at an average speed.

D.They had slow metabolic rates.

参考答案：A

参考解析：

细节理解题。根据第三段第二句“They first found 10 overweight and inactive but otherwise healthy young men, whose lifestyles are far better and worse, representative of those of most of us.”可知，他们首先找到了10个超重的，不活跃但健康的年轻人，他们的生活方式可以说更好，也可以说更糟，代表了我们大多数人。因此可知，实验时选择的10个人的生活方式代表了普通人。故选A。

知识点：阅读理解四选一英语专业基础知识阅读理解教师招聘-小学英语