According to the principle of comparative advantage,
A. countries should specialize in the production of goods for which they have a higher opportunity cost than their trading partners.
B. countries should specialize in the production of goods for which they use fewer resources than their trading partners.
C. countries should specialize in the production of goods for which they have a lower opportunity cost than their trading partners.
D. countries should specialize in the production of goods for which they use more resources than their trading partners.