Chile has a comparative advantage over the United States in copper. Which of the following is a source of this comparative advantage?

Question

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Chile has large deposits of copper ore, which is a natural resource that is not equally available in the United States. This gives Chile a comparative advantage in copper production as they can produce copper at a lower opportunity cost compared to the US. Mild temperatures (A) and high tariffs on copper from other nations (D) are not sources of comparative advantage in copper production. No opportunity cost associated with copper production (C) is not a valid answer as there is always an opportunity cost associated with the production of any good or service.

Chile Has a Comparative Advantage Over the United States in Copper