"The 49th parallel separating the United States and Canada is an example of... A) a relic boundary B) a superimposed boundary C) an antecedent boundary D) a subsequent/ethnographic boundary E) an open boundary"
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Answer

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Step 1:
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Step 2:
: Understand the key characteristics of boundary types

- Relic boundary: A historical boundary that no longer serves a political purpose - Superimposed boundary: A political boundary drawn by external powers, typically ignoring local geographic or cultural conditions - Antecedent boundary: A boundary established before the current landscape developed - Subsequent/ethnographic boundary: A boundary that develops after the cultural landscape is established - Open boundary: A boundary with free movement between regions

Step 3:
: Analyze the 49th parallel boundary

- Established in 1846 by the Oregon Treaty between the United States and Great Britain - Drawn as a straight line across diverse geographic terrain - Created through diplomatic negotiation, not reflecting local cultural or physical landscape features

Step 4:
: Identify the most appropriate classification

- The boundary was artificially drawn by external powers (British and American diplomats) - It does not follow natural geographic features - It was imposed without consideration of existing cultural or ethnic landscapes

Step 5:
: Conclusion

The 49th parallel is a classic example of a superimposed boundary.

Final Answer

B) A superimposed boundary