In the four-part Fair Use test, which factor asks about how much of the work was used?

• A. The duration of the copyright term.
• B. The author’s intent.
• C. The audience's reaction.
• D. The amount and sustainability of the portion used in relation to the copyrighted work as a whole.

Answer: (D)

The third factor of the fair use test asks about how much of the work was used. It looks at both the quantity taken and the quality of what was taken—whether the portion used is large or small, and whether that portion is the “heart” or most essential part of the work. The idea is that copying a large portion or the core portion weighs against fair use, while using a smaller, non-central part can weigh in favor, especially if the use is transformative or serves a different purpose. The other factors consider why the use was made (is it for critique, commentary, education, or transformation), the nature of the original work (creative versus factual), and the impact on the market for the original (would the use harm licensing opportunities or potential sales). The duration of the copyright term, the author’s intent, and audience reaction aren’t part of the fair use analysis.