Final answer:
The best example of literary nonfiction is a letter that describes a civil rights leader's experience in prison.
Step-by-step explanation:
The best example of literary nonfiction is option A: A letter that describes a civil rights leader's experience in prison. Literary nonfiction refers to writing that presents factual information in a narrative or storytelling format. In this example, a letter is a personal account of the civil rights leader's experience, making it a literary form of nonfiction.
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