听力原文：

Childhood is a time of fun and games. Many people still remember when they were young, they often played games like hide-and-seek and chess. Playing teaches children how to treat others, and it also helps to exercise the mind and body. However, children today spend most of their time in front of the computer, playing video games.

A recent survey found that in the U.S., children between 8 and 12 spend at least 13 hours a week playing video games or “gaming.” Boys of this age spend even more time, almost 16 hours a week. Although some people will say that gaming is helpful, it brings many problems as well.

答案：4. C