Answer:
A. demilitarized zone
Explanation:
It is called the Demilitarized Zone (DMZ) the 5 km wide region that surrounds the border between the two Koreas (North Korea, socialist state and South Korea, capitalist-inspired government). Such an area was created after the 1953 armistice, which "interrupted" the conflict between the two Korean states. In practice, both countries are still in a state of belligerence, meaning no peace treaty to end the conflict has been signed to date.
