[U9R3] Which of the following is true about the theory of Yin-yang?
A.
The characteristics of Yang are active, internal, warm, and organic.
B.
Yin-Yang can be used to explain the pathological changes in the human body.
C.
The heat, warmth, sour and bitter of foods belong to Yang.
D.
Yin-Yang describes the movement and static laws of things in nature.