单选题 With which of the following topics is tile passage mainly concerned?
【正确答案】 D
【答案解析】本文卞要阱述的是如何控制电视节目对孩子的影响,家长们often seek control of TV from some outside agency,而研究却表明最为有效的控制can be exerted from within the home,选项D“控制电视节日对孩子的影响”最能概括文章内容。