What Is One Serious Risk That Social Media Pose to Promotional

What is one serious risk that social media pose to promotional messages?

A) Social media leave permanent records of a firm's MPR missteps.
B) Firms may not use enough social media because of the high cost.
C) Social media are fringe media, and reputable firms do not use them.
D) People pay little attention to social media because they have been around a very long time.
E) Most public relations practitioners do not know how to use social media.