资料：The movement of consumers from public social media to private messaging has been so rapid that Business Insider reported that the combined usage of the top four messaging apps now exceeds the combined usage of the top four social media apps。Falling data prices，cheaper devices，and improved features are helping propel this growth。
Why the hunger for private messaging apps？ Perhaps people are becoming more interested in actually communicating rather than broadcasting。Maybe we don’t want personal and private lives merging any more and we want control over our different social circles within these messaging apps。As my 16-year-old nephew put it，“My friend posted on Facebook and we made fun of him。We only use Snapchat now because who wants to put everything in public all the time？ This just connects me with my real friends。”
Social media won’t go away，but traditional social networks may become less important to certain groups。The rise of more intimate channels presents new opportunities，and perhaps perils，for marketers。
What is NOT the reason for the growth of private messaging apps？
本题考查的是细节理解。
【关键词】NOT；reason for the growth of private messaging apps
【主题句】第1自然段Falling data prices，cheaper devices，and improved features are helping propel this growth.数据价格下降、设备更便宜以及功能改进都有助于推动这一增长。
第2自然段Why the hunger for private messaging apps？ Perhaps people are becoming more interested in actually communicating rather than broadcasting。为什么出现对私人信息应用程序的渴望？也许因为人们正对实际的交流而不是广播更感兴趣。
【解析】本题的问题是“以下哪一项不是私人信息程序增长的原因”。 A选项“人们厌倦了社交媒体”；B选项“程序功能的进步”；C选项“人们需要真实的交流”；D选项“更便宜的数据和设备”。根据题目中关键词找到主题句，主题句中，B、C、D三个选项均有涉及，故选A。
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