Which of these is one of the two longest rivers in the United States?

1. The United States has two rivers that count as its longest. 2. They are the Missouri River and the Mississippi River. 3. The Missouri River is one of the two, so it is the answer. 4. The Hudson River runs past New York City, where the Statue of Liberty stands, but it is not one of the two longest. 5. The Ohio River is a real river as well and still does not make the pair. 6. The Delaware River shares its name with one of the 13 original states, which is a name trap rather than a clue. _Source: USCIS Civics Flash Cards M-623 (rev. 02/12), public domain, official civics question 88_