The answer is: The Great Depression
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Answer: René Robert Cavelier, Sieur de la Salle
Explanation: In 1682 René Robert Cavelier, Sieur de la Salle, exploring the Mississippi River, claimed for the French king all the lands drained by it. He is credited with naming the territory Louisiana, which included present Oklahoma.
He revolutionized the use of space, light, and color to create vivid images of people.
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