There are a variety of online advertising options. The most popular are:
A. free search, classifieds, interactives, and interstitials.
B. free search, banner ads, spamming, and video.
C. wikis, RSS feeds, interstitials, and cookies.
D. paid search, banner ads, classified ads, and video.
E. pop-ups, paid search, streaming video, and spamming.
Answer: D
If the answers is incorrect or not given, you can answer the above question in the comment box. If the answers is incorrect or not given, you can answer the above question in the comment box.