Which period in us history is known as the gilded age early 18th century late 18th century early 19th century late 19th century

Late 19th century

Explanation: Mark Twain called the late 19th century the "Gilded Age." By this, he meant that the period was glittering on the surface but corrupt underneath. In the popular view, the late 19th century was a period of greed and guile: of rapacious Robber Barons, unscrupulous speculators, and corporate buccaneers, of shady business practices, scandal-plagued politics, and vulgar display.

a memoir is the correct answer

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is slave