U.S. History

Which of the following was designated a national monument first?

More Questions from U.S. History
Which of these U.S. states was admitted to the union the earliest?
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Under which President did Warren Christopher and Madeleine Albright serve as secretaries of state?
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In what state were the most major battles of the American Civil War fought?
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Who was the only U.S. President who did not live in the White House?
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Who was assassinated on November 22, 1963?
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What school did Al Gore graduate from?
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The speed limit in NYC was what in 1895?
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Did all Comanche warriors carry battle spears?
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