参考答案

正确答案：A
解析：[听力原文]
What is one of the characteristics of Americans?
由选项推测本题与美国人的生活方式或性格有关。本题关键句为“Because the United States is a highly active society， full of movement and change，people always seem to be on the go。”意思是美国社会充满变化，人们非常活跃，故正确答案为A)。