Which of the following is the most common form of content marketing in the mobile arena?

A) Text ads
B) Search engine results
C) Mobile-optimized video
D) Google ads
E) Facebook ads

C)Mobile advertising is already a multibillion-dollar business, with nearly 70 percent of that spent on Google ads and Facebook ads. The types of marketing and sales messages created for mobile audiences range from short, simple text ads that search engine results to mobile-optimized video-the most common form of content marketing in the mobile arena.