1.) The very first reason that most people are because some people are scared. They think that cyber bullying may occur or that they will die if those people find them. Which doesn't happen unless you post pictures of yourself.
2.) The next reason is because either they are their friends or they are saying threats. Most people get scared and defriend them
the answer is A to this. I might have it confused with a different book.
The Answer would be D its very independent on its own.<span />