Fill in the blank. The Canada–United States border is traditionally known as the world's longest ______ border.
Answer: undefended
Millions cross what is traditionally known as 'the world's longest undefended border' between Canada and the United States.
All answer choices
- undefended (correct answer)
- fortified
- disputed
- closed
This practice question is based on Discover Canada, the official study guide for the Canadian citizenship test. Brush up on this topic in our Economy & Industry study guide.
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