points - 20 , brainliest , and thank you , 5 star
The area labeled in green represents what region of North America and the present-day United States?
A) the Great Plains
B) the Rocky Mountains
C) the Appalachian Mountains
D) the Mississippi River Valley
![points 20 brainliest and thank you 5 starThe area labeled in green represents what region of North America and the presentday United StatesA the Great Plains B class=](https://us-static.z-dn.net/files/df3/f92fa67c13fa43781791a3d7dcbe85c7.png)