Question

Immigrants come to these two North American countries because of their high standards of living. Canada Greenland Mexico U.S.

Answer 1

the answer is Canada,Mexico, and the U.S.

Answer 2

I think the question here asks for Canada and US: those two countries are know to be popular immigrant choices.

Also, while Greenland is part of Northern America, it has been closer associated with Europe, and it's rarely actually called a "northern American country"