How Does the Heckscher-Ohlin Approach Explain Why There Is International

How does the Heckscher-Ohlin approach explain why there is international immigration?

A) Countries who recognize the logic of comparative advantage reduce barriers to international migration.
B) Protectionism,which benefits the abundant factor,forces the scarce factor to leave a country in search of greater profits.
C) Differences between industry sectors determine whether labor would remain in a country or immigrate to another country.
D) Differences in factor endowment lead to the export of goods or capital associated with a country's scarce factor.
E) Differences in factor endowment lead to the export of goods or capital associated with a country's abundant factor.