All of the Following Statements About Social Networking Sites Are

All of the following statements about social networking sites are true EXCEPT:

A) many social network sites like Facebook officially prohibit users younger than 14 or 13 years of age
B) some estimates suggest that almost 40 percent of 9-12-year-olds use Facebook
C) some children and adolescents may use social network sites to create role-playing groups
D) most parents carefully monitor their children's activities on social networks