Name one of the two longest rivers in the United States.

The Missouri River and the Mississippi River are indeed two of the longest rivers in the United States, both exceeding 2,300 miles in length. The Missouri River, which flows from Montana and joins the Mississippi River near St. Louis, is often considered the longest river in the U.S. Meanwhile, the Mississippi River, known for its significant role in American history and commerce, is recognized for its vast watershed that drains through several states before reaching the Gulf of Mexico.

In contrast, the other options do not contain both rivers that are ranked among the longest. The Ohio River, while significant, is much shorter than either the Missouri or Mississippi. The Columbia and Colorado rivers also do not compare in length to the two longest rivers in the nation. Similarly, the Hudson and Delaware rivers, while important in their regions, are not nearly as lengthy as the Missouri and Mississippi. Understanding this context underscores the distinction between these rivers and solidifies the choice for the two longest in the U.S. being the ones listed in the correct answer.