I hear many parents complaining their age children are rebelling. I wish it were so. At your age you ought to be growing away from your parents. You should be learning to stand on your own two feet. But take a look at the present rebellion. It seems that agers are all taking the same way of showing that they disagree with their parents.
Instead of striking out boldly on their own, most of them are ducting(通过管道输送) at one another’s hands for reassurance.
They claim they want to dress as they please. But they all wear the same clothes. They set off in new directions in music. But somehow they all end up huddled round listening to the same record. Their reason for thinking or acting in thus—and such a way is that the crowd is doing it. They have come out of their cocoon(蚕茧) into a large cocoon. It has become harder and harder for a ager to stand up against the popularity wave and to go his or her own way. Industry has firmly carved out a age market. These days every ager can learn from the advertisements what a ager should have and be. And many of today’s parents have come to award high marks for the popularity of their children. All this adds up to a great barrier for the ager who wants to find his or her own path.
But the barrier is worth climbing over. The path is worth following. You may want to listen to classical music instead of going to a party. You may want to collect rocks when everyone else is collecting records. You may have some thoughts that you don’t care to share at once with your classmates. Well, go to it. Find yourself. Popularity will come with people who respect you for who you are. That’s the only kind of popularity that really counts.The author thinks of advertisements as（）

A．convincing
B．influential
C．instructive
D．authoritative