I will go through the answers:
The border between Mexico and New Mexico is a thin, black line; this indicates an international boundary.
- false! it's a thick black line.
The border between California and Mexico is a blue line; this indicates an international boundary.
-false again, it's a thick black line.
The border between Arizona and New Mexico is a thin, blue line; this indicates a state boundary.
-almost, it's a thin line, yes, but it's not blue, it's black~!
The border between Arizona and New Mexico is a thin, black line; this indicates a state boundary.
-correct: it's a thin line, and it's a state boundary, correct!
