Final answer:
The period of prosperity and cultural experimentation in the U.S. after WWI was known as The Roaring 20's.
Step-by-step explanation:
The period of prosperity and cultural experimentation in the U.S. after WWI is known as The Roaring 20's. It was a time of economic growth, urbanization, and increased consumerism. This era was characterized by jazz music, flapper culture, and advancements in technology.
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