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World Landmarks
The Great Wall of China is about _____ kilometers long.
Correct answer: A
Explanation and memory cue
The total length of all sections of the Great Wall of China ever built is approximately 21,196 kilometers (about 13,171 miles), including overlapping and rebuilt sections. However, the commonly cited length for the main and well-preserved sections, especially those from the Ming dynasty, is about 18,196 kilometers. Among the given options, 18,196 km (option A) is the closest and most widely accepted figure for the length of the Great Wall.