Question

the ______ serves as a border between the northeastern united states and canada.
a. mackenzie river
b. mississippi river
c. st. lawrence river
d. rio grande

please select the best answer from the choices provided.

○ a
● b
○ c
○ d

Explanation:

• Mackenzie River is in Canada's north.
• Mississippi River is in the US interior.
• Rio Grande is a US - Mexico border.
• St. Lawrence River forms part of the US - Canada border in the Northeast.

Answer:

C. St. Lawrence River