Red does not belong because all the others are either countries or states
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Missouri, red, Ohio, and Illinois
Colorado, Brazos, Canadian, Red
There are several tributaries to the Mississippi River. Five of these tributaries are the Missouri, Ohio, Arkansas, Black, and Red Rivers.
the Ohio,Missouri,Arkansas, and the red river
The Mississippi River, the Missouri River, and the Arkansas River are some examples.
The Missouri River empties into the Mississippi River at St. Louis.
Red river Missouri river, Arkansas river Mississippi Platte
The longest river is the Mississippi River, and the longest combination is the Mississippi-Missouri River. The Missouri crosses the central US before joining the Mississippi at St Louis. The Mississippi itself from Minnesota to the Gulf of Mexico is 3779 km (2348 miles) long. The entire Mississippi-Missouri combination, measured from Brower's Creek in Montana to the Gulf, is a continuous waterway more than 6027 km (3745 miles) in length.
If you're speaking of the "Red River of the North" that forms much of the border between North Dakota and Minnesota, it NEVER joins the Mississippi, but flows NORTH and empties into Lake Winnipeg. The Red River, not the one mentioned above joins the Mississippi in the marshes near to Shreveport.
the Missouri,.Rock River, Ohio River, Red River and White River and others
Well there is a Red River in Kentucky, Maine, Mississippi, New Mexico, Tennessee and Winsconsin. So take your pick.