Given a text T, and several options, according to the question posed in the text T to choose the most appropriate option from the options as the answer, please directly output the most appropriate option, do not need to output the explanation.

According to the Heckscher–Ohlin model, when trade opens:
Option A:the scarce factor gains relative to the abundant factor in each country.
Option B:the abundant factor gains relative to the scarce factor in each country.
Option C:income is redistributed between countries but not within each country.

Answer: B