单项选择题We may infer from the first paragraph that parents()
A. find that their children like to watch those sex or violence TV programs B. hope that school or society can do something to control bad TV programs C. feel that they can exert some influences on their children at home only D. realize that there is a generation gap between them and their children
单项选择题The author uses the example of the soap bubble blower to show that______.