Question

Which of the following is a true statement about the map?

The border between North Dakota and South Dakota is a thin, black line; this indicates a state boundary.
The border between North Dakota and South Dakota is a thin, blue line; this indicates an international boundary.
The border between North Dakota and Montana is a thin, black line; this indicates an international boundary.
The border between North Dakota and Montana is a thick, black line; this indicates a state boundary.