Before WWI O A, international trade was almost inexistent because of trade barriers. O B. labour mobility was greater than today because passport controls or
Before WWI O A, international trade was almost inexistent because of trade barriers. O B. labour mobility was greater than today because passport controls or visas were rarely used. O C. labour mobility was lower than today because transportation was more expensive. O D. capital flows were inexistent due to the lack of a technological infrastructure and investment opportunities
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