A survey shows that 82% of elementary school students use the Internet every day, 84% use QQ every day, 78% use QQ space every day, and 65% use Weibo every day. According to this, some people think that primary school students have been passive from the media. Transform into active participants and communicators. If the following are true, what weakens the above argument? ['QQ friends of primary school students or Weibo followers are mostly limited to classmates.', 'most primary school students spend less than half an hour online every day.', 'student home monitoring software is installed in most home computers.', 'most elementary students use QQ space and Weibo just to browse information.']