A. how advertisers target young children B. how important it is to protect children from advertisements C. about the history of selling products to children D. why advertisers target young children 参考答案:B 答案解析:属主旨思想题。作者通过讨论孩子被当成互联网广告的目标群体告诉我们保护孩子不受广告影响的重要性。