Just Casuals, a Brand of Street Wear in California, Recently

Just Casuals, a brand of street wear in California, recently advertised its newly launched line of clothing. The firm pays Spyder, a search engine, for delivering the link to its Web site as the top search result to Internet users when they search for words such as "jeans" and "fashion." This is an example of ________.

A) product placement
B) flyposting
C) keyword advertising
D) direct marketing