What best describes the difference between plagiarism and fair use?

Plagiarism means presenting someone else’s words or ideas as your own without giving credit. Fair use is a limited use of copyrighted material that may be allowed without permission; nonprofit or educational purpose can support fair use, but does not automatically make any use fair. So the best choice is “Plagiarism is copying material without crediting the source, while fair use is a limited, nonprofit use.”

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