* Prose is the ordinary form of written language, as opposed to verse or poetry. It's characterized by its use of sentences and paragraphs.
Let's analyze the options:
* A. A painting done by Andy Warhol: Paintings are visual art forms, not written prose.
* B. The lyrics of a song by the Beatles: While lyrics can tell a story, they are often structured in a poetic form with rhyme and meter.
* C. An article in Newsweek magazine: Articles are written in standard prose, using sentences and paragraphs to present information.
* D. A poem written by Walt Whitman: Poetry uses specific structures and language techniques that differ from prose.
Therefore, the best example of prose is an article in Newsweek magazine.