The commonality among the Mississippi River, the Appalachian Mountains, and the Rocky Mountains is C. They all create rigid borders that affect the culture and trade of the people on either side of them.
<h3>What other features mark the Mississippi River, the Appalachian Mountains, and the Rocky Mountains?</h3>
Mississippi River, the Appalachian Mountains, and the Rocky Mountains feature the Great Plains found between them.
Other features of these locations are the beauty of watersheds and the wonderment of high elevations.
Thus, the common thing that the Mississippi River, the Appalachian Mountains, and the Rocky Mountains possess is Option C.
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