Correct Response: D. Articles in professional journals are written and reviewed by professionals in the relevant field. They contain citations to back up their statements. The primary purpose of a professional journal is to publish the most up-to-date and valid information available. Popular magazines (A) are required to write articles that will attract readers to buy the magazines, and to buy the goods and services advertised in the magazines. Infomercials (B) are written and produced with the single goal of selling a particular product or service. Web pages (C) vary greatly in terms of the validity of the information they contain. Web pages are primarily created to promote a particular point of view, or to sell a product or service.
