Answer:
The correct answer is B. The area that has removed most restrictions on the movement of people between countries in its region is Europe.
Explanation:
As of the end of World War II, Europe began to aim at regional integration, in order to avoid future large-scale conflicts, and to have a fluid relationship between nations that would allow dispute resolution in a peaceful and diplomatic manner. This is how, starting in 1951, various treaties began to be signed that gave rise to what we know today as the European Union.
Parallel to the formation of the European Union, in 1985 the Schengen Agreement was signed, which abolished internal borders between the signatory European countries, allowing the free movement of persons belonging to the nations signing the agreement. In this way, European citizens (practically most of the members of the European Union have signed the agreement, in addition to countries that are not part of the Union, such as Switzerland) have freedom of mobility and residence throughout the continent.
