Which of the following statements about Facebook is INCORRECT？A．It"s a popular social netw

Which of the following statements about Facebook is INCORRECT？

A．It"s a popular social networking site with 800 million users.

B．It requires all the users to use their real identities.

C．Users who are younger than 13 can"t use it.

D．It encourages parents to help children to get online.

请帮忙给出正确答案和分析，谢谢！