Facebook's Charging for User Actions That Generate More Sales for Advertisers

Multiple Choice

Facebook's charging for user actions that generate more sales for advertisers demonstrates

A) the influence of social network users in the marketplace.
B) the monopoly of Facebook over the marketplace.
C) the increasing effectiveness of advertising on social networking sites.
D) the convergence of social networking sites with each other.
E) the ethically questionable mode of Facebook charging advertisers for using their site.