What is one advantage the United States has over Canada for maintaining a diversified economy?

Question

The U.S. has a greater gold resource.
The U.S. has a greater labor resource. The U.S. has a greater per capita of fresh water.
The U.S. has a greater land resource. ***

Answer 1

But Canada has more land than the U.S.

Answer 2

is it C?

Answer 3

I think that you are right. It says land resource, not land.

Answer 4

It is either C or D.