Question

The __________ serves as a border between the Northeastern United States and Canada.

Answer 1

The correct answer is C. St. Lawrence River because it is a river in the North-East USA that separates Canada and America. The Rio Grande separates us from Mexico, while the Mississippi river is in the mid-west of the US. The Mackenzie is in North-West Canada, so it also would be incorrect.

Answer 2

The St. Lawrence River serves as a border between the Northeastern United States and Canada. The St. Lawrence River is located in the middle latitude of North America. It is a large river that flows north-easterly direction. It serves as an international boundary between Canada, Ontario and US.