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 friends who want to use the same social networking site as she. They'd love to use their lunch hours at work chatting and catching up with friends. But for some reason their access has been blocked. You explain to Judy that more and more companies are blocking access to social networking Web sites because of ____.

A) security
B) loss of worker productivity
C) both a. and b.
D) neither a. nor b.