According to the armistice, the demilitarized zone (DMZ) was established to ...

A. ensure that the provisions of the agreement were met.

B. give the UN a foothold in the region.

C. create a barrier between the two sides.

D. prevent the reunification of Korea.

The answer is C

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Create a barrier between the two sides.

Explanation:

Armistice is a formal truce between warring parties to stop fighting, in which the parties may agree to temporarily or permanently stop fighting which cease all military operations in a conflict; a temporary suspension of hostilities though not the war itself. World War I ended with the armistice of 1918 between the Allies and their opponent, Germany.

Demilitarized zone is an area where there is an understanding between nations which stipulate that there will be no military presence, activities or personnel. Demilitarized zone demarcates boundary between two or more country which are usually came in effect by armistice.

According to the armistice, the demilitarized zone (DMZ) was established to create a barrier between the two sides.

Example is the Korean demilitarized zone.