选择题：What time did the TCM theoretical system primarily from?

题目内容：

What time did the TCM theoretical system primarily from?

A.In the Warring States.

B.In the Qin Dynasty.

C.During the period of the Qin-Han Dynasties.

D.During the period of the Warring States and the Qin-Han Dynasties.

参考答案：

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