The Great Wall of China is approximately 13,170 miles long. This means that none of the options provided (A. 6,000 miles, B. 4,000 miles, C. 2,000 miles, D. 1,000 miles) are accurate. The Great Wall of China is one of the most famous structures in the world, built over centuries by different Chinese dynasties to protect against invasions from various nomadic groups in the north. It is a UNESCO World Heritage Site and a symbol of China's rich history and culture.