Citations are essential when analyzing an article. They show exactly where ideas, data, and quotes come from, allow readers to locate the original sources, and help you avoid plagiarism. Citations also help you separate the article’s ideas from your own analysis, adding credibility to your evaluation and enabling others to verify what you discuss. In practice, your analysis will refer to the article’s claims and evidence and attach appropriate citations so readers can see the sourcing behind those points. The article’s thesis or topic are important to understand and discuss, but they’re aspects of the article itself, not the practice that must be demonstrated in your analysis to show scholarly rigor. Notecards, meanwhile, are a planning tool rather than part of the analysis content. So citing sources is the best answer because attribution and traceability are fundamental to credible analysis.

Web browsers are software programs that let you access and view pages on the World Wide Web. They request pages from web servers, interpret HTML/CSS/JavaScript, and display the results with features like an address bar and navigation controls. Edge fits this role as a web browser you install to browse the web. The other options serve different purposes: a search engine helps you find pages, but isn’t the program you use to view them; a web portal combines search with a homepage; a metasearch engine gathers results from multiple search engines. Because Edge is the program designed to display web pages, it is the best example.

The main idea here is how different types of intellectual property protect different things. A patent covers inventions—new, useful, and non-obvious ways to do something or make something. It gives the inventor exclusive rights to make, use, or sell that invention for a limited time, in exchange for publicly disclosing how it works. A trademark, on the other hand, protects brand identifiers—words, logos, symbols, or phrases—that help consumers recognize the source of goods or services. Trademarks aren’t about the invention itself; they’re about preventing confusion in the marketplace about who provides the product. Patents typically last about 20 years for utility inventions, after which others may use the invention, while trademarks can last indefinitely as long as they’re actively used and renewed. The idea of “open to fair use” doesn’t apply to patents or trademarks—that concept comes from copyright law, which protects creative works like art, books, or music. So, the correct distinction is that patents protect inventions, and trademarks protect brand identifiers like symbols or phrases.

In a classroom, the idea is that copyright gives protection, but fair use provides a limited, context-dependent exception for instruction. The key is that what you can do without permission depends on four factors, all weighed together. First, why you’re using the material and how you’re using it matters. If the use is for education and contributes to teaching, analysis, commentary, or critical discussion, this weighs in favor of fair use. It isn’t a free pass, but it recognizes legitimate instructional needs. The setting being noncommercial also helps the case for fair use, though it doesn’t guarantee it. Second, the nature of the work influences the decision. Using non-fiction, factual content or works that are closer to informational materials tends to be more favorable to fair use than copying highly creative works like novels or movies, where the creator’s rights are stronger. Third, how much you copy is important. Using a small, non-central portion is more likely to be fair use than reproducing large sections or the “heart” of the work. The idea is to serve the instructional purpose without substituting for the original or undermining the market for licensing. Fourth, the effect on the market for the original matters. If the classroom use could replace the need for the original or harm the author’s ability to earn from licensing, that weighs against fair use. Applied to a classroom setting, this means you might show a brief clip for discussion, quote a short passage for analysis, or provide excerpts that support a lesson, as long as the use aligns with these factors. There isn’t blanket permission for all classroom copying, and it isn’t unlimited copying. It also isn’t restricted only to academic publishing; fair use can apply in other instructional contexts as well. When in doubt, consider licensing, use open educational resources, and consult your institution’s guidelines. The correct option reflects this nuanced, factor-dependent approach: teachers and students may use limited portions for instruction under fair use, but the allowance depends on purpose, amount, nature, and effect on the market; not a blanket exception.