According to the theory of comparative advantage, A. A country can gain from trade only if it can produce all goods at a lower cost than its trade partner B. A country can gain from trade only if it...

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Extracted text: According to the theory of comparative advantage, A. A country can gain from trade only if it can produce all goods at a lower cost than its trade partner B. A country can gain from trade only if it can produce a good more efficiently than the other country C. Any country can gain from trade D. Only high income countries will gain from trade