What Has Research About Cyberbullying Established

What has research about cyberbullying established?

A) Cyberbullying has been linked to poor academic performance, depression, withdrawal, drug and alcohol abuse, and even suicide.
B) Grade, or elementary, school is the peak period for cyberbullying.
C) Few schools or companies have policies that can help provide protection against cyberbullying.
D) Victims of cyberbullying are far more likely to tell adults about online harassment than their friends.