Which of the following is a major physical feature in North America?

a.

Mississippi River

c.

Great Lakes

b.

Rocky Mountains

d.

All of the above

All of the above, the mississipi river is widely knows and also the mountains

I believe D is the answer

The Mississippi River is one of the major river in North America

The Great Lakes includes a lot of lakes

The Rocky mountains is the longest mountain in North America

So all of the above!