the Appalachian Mountains the Mohave Desert the Mississippi River the Great Lakes
I gave my students this multiple choice question: Which geologic feature is evidence that the North American plate once collided with the Eurasian and African plates?

Only one answer is correct among these 4 choices:
- the Appalachian Mountains
- the Mohave Desert
- the Mississippi River
- the Great Lakes

Could you tell me which one is correct?

the Appalachian Mountains