Answer:
The correct answer is letter "C": trade enables individuals to obtain the goods in which they do not have a specialization.
Explanation:
British economist David Ricardo (1772-1823) in his book "Principles of Political Economy" (1817) proposes countries should specialize in the production and export of products they are more efficient at. Then, those countries could obtain the products they are deficient in manufacturing importing them from more efficient nations. With this idea, Ricardo was establishing the basis of what is known today as "comparative advantage".