Final answer:
The focus of the article in "Revolution 2.0" is indicated by the main theme and subject matter (D). To assess credibility, one should look not only at the author's perspective and the evidence used but also consider the authority and credibility of the sources providing the information.
Step-by-step explanation:
The evidence from the section that reveals the focus of the article in "Revolution 2.0" is D) the main theme and subject matter. Evaluating the publisher, the author's credentials, and the content of the article itself are all part of establishing the credibility and understanding the perspective of the piece. When examining an article such as "Revolution 2.0", it's important to consider the author's angle, evident in the evidence provided, and how well it is supported by credible sources. Whether discussing topics in American history or any other subject, authoritative sources, credible evidence, and clear organization around a central thesis or main idea contribute to the reliability and focus of the article.