Judy Has Joined a Social Network

Multiple Choice

Judy has joined a social network. She's having a blast, but a few things have her concerned. You tell her that you have experience with social networking sites, and you're happy to answer her questions.
-Judy has found the name of an old friend that she wants to add to her contacts. She hasn't spoken to her in years, and is eager to get back in touch. She asks you what you think. You tell her that ____.

A) all social networks are anonymous and therefore completely secure
B) there are many people with the same name, and the same life details, so she should make sure the person she's contacting is the right person
C) because the nature of an online social network requires you to provide real information about yourself, you might be putting yourself at risk for identity theft and other privacy problems.
D) none of the above