For Any Country,if the World Price of Copper Is Higher

Multiple Choice

For any country,if the world price of copper is higher than the domestic price of copper without trade,that country should

A) export copper,since that country has a comparative advantage in copper.
B) import copper,since that country has a comparative advantage in copper.
C) neither export nor import copper,since that country cannot gain from trade.
D) neither export nor import copper,since that country already produces copper at a low cost compared to other countries.