Based on historical perspective, the characteristics early Japanese, Chinese, and Korean civilizations shared was "They were neighboring countries that shared a common history."
The three countries China, Japan, and Korea, are all in the North East of Asia.
These three countries are closer to each other geographically, and they share a common history through trade, culture, and relations.
Hence, in this case, it is concluded that the correct answer is option C." They were neighboring countries that shared a shared history."
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