Which of the following best defines plagiarism?

• A. Presenting others' work as one's own.
• B. Methods for properly referencing sources used.
• C. Exchange of knowledge within academic communities.
• D. Moral principles governing academic conduct.

Answer: (A)

Plagiarism is presenting others' work as one's own. It means taking someone else’s writing, ideas, or creative output and claiming it as your own without giving proper credit. This can include copying text verbatim without quotation marks or citations, paraphrasing someone else’s ideas without attribution, or using another person’s structure or arguments without acknowledging the source. The reason this is the best definition is that it gets at the core harm: misrepresenting authorship and failing to credit the original creator. Understanding this also helps clarify why proper referencing matters—it's the tool to prevent plagiarism by clearly signaling where ideas come from. The other options describe related practices or contexts but aren’t the act itself: properly referencing sources is the method to avoid plagiarism, not the act; exchanging knowledge within academic communities describes a general practice of sharing information; and moral principles governing academic conduct refer to ethics more broadly rather than the specific act of taking someone else’s work.