U.S. Geography

What is the two-letter postal abbreviation for the state of Colorado?

More Questions from U.S. Geography
Which of these states had the fewest people residing within its borders at the start of the 21st century?
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When did California achieve statehood in the USA?
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What university in North Carolina is the oldest state university in the United States?
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Which Spanish explorer visited the area that is now Tennessee in 1540?
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Which of these rivers is located in the U.S.?
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What is the third largest city in population in Minnesota?
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In which U.S. state will you find the cities of Des Moines, Cedar Rapids, Davenport and Sioux City?
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Oklahoma was originally part of what 1803 U.S. land acquisition?
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