Answer:
The correct answer is letter "A": Heckscher-Ohlin.
Step-by-step explanation:
Named after Swedish economists Eli Heckscher (1879-1952) and Bertil Ohlin (1899-1979), the Heckscher–Ohlin theory states that countries should focus their efforts on producing and exporting those goods they are good at manufacturing and they should import the goods they struggle in making. The concept is based on both the productivity and non-productivity of nations and their best bequests.