单项选择题

Many teenagers in the United States work pall rime (兼职) while they go to high school. They do not work because their fanlilies are poor; they work so they can have some money of their own (自己的) to spend. Many pents encourage (鼓励) their teenagers to work. They believe that having a job when you am young makes you a more responsihle (有责任心的) adult (成年人). So before or aftrier school they work in the mslaurants. do mowing (割草) for neighbom (邻居) paint houses for eompaaies (公司). deliver (送) food or goods to msidcms (居民). etc. All these tilings make them leto to save (节省) money and to value (珍惜) money.
What do these teenagecrs do before or after school

A. They make things for people.
B. They pathl hours.
C. They cook fad for travelelers.