Based on the North America physical map found below, what is the difference between the Appalachian Mountains in the East and the Rocky Mountains in the West?

The Rocky Mountains on the western side of North America have a higher elevation.

B
The Appalachian Mountains on the eastern side of North America have a higher elevation.

C
The Rocky Mountains are a part of the Great Plains on this map.

D
The Appalachian Mountains are located closer to Canada than the Rocky Mountains.