The peninsula between North Korea and South Korea was established by the Demilitarized Zone between 1950-1953 So the answer is D
The Demilitarized Zone (DMZ) between North and South Korea was established in 1953 as part of the armistice agreement that ended the Korean War. This zone was meant to prevent military confrontations and remains one of the world's most fortified borders. Therefore, the correct answer is D. 1953.
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