根据短文和图表内容，选择最佳答案。

Do teenagers in small villages do housework at home? How about the teenagers in big cities? To know the answers, 21st CENTURY made a survey last month. They asked 4,000 teenagers in China. Half of them come from big cities like Beijing, Shanghai and Guangzhou. The others are from small villages. They made a chart(图表) according to our survey. Let's have a look at it.

We can find out that teenagers in small villages do more housework than those in big cities. Maybe it is because they live a harder life. We will give our ideas to parents in big cities. We think parents should make their children do some housework because it's a good way for teenagers to learn how to take care of themselves.