参考答案和解析
正确答案：
C
解析：
主旨题。录音首句为主旨句，指出“Today, I ask you to focus on the challenges of the Information Age”，表明该段录音主要讲述的是信息时代的培训，接着说话者具体说明了该挑战的主要内容。因此，选项B符合该段录音主旨。
【录音原文】
Today, I ask you to focus on the challenges of the Information Age. The dimensions of the Information Revolution and its limitless possibilities are widely accepted and generally understood, even by lay people. But to make the most of it, we must acknowledge that there are challenges, and we must make important choices. We can extend opportunity to all Americans or leave many behind. We can accelerate the most powerful engine of growth and prosperity the world has ever known, or allow the engine to stall.
