Answer:
The correct answer is letter "B": The Leontief paradox.
Explanation:
The Leontief paradox is the result of a research made by German economist Wassily Leontief (1906-1999) in the 1950s after which he observed that countries with large capital such as the U.S. were importing more capital-intensive products and exporting more labor-intensive goods.
The Leontief paradox opposed the Heckscher-Ohlin Theorem that stated large capital countries tend to export products they manufacture efficiently and import those they are not good at producing.