What is NOT the right description of “yin”?

A.“yin” originally referred to the shady side of a slope.

B.“yin” originally referred to the sunny side of a slope.

C.The concept of “yin” and “yang” often occurred in pairs in Chinese philosophy.

D.Ancient people recognized nearly all things could have yin and yang properties.

正确答案：“yin” originally referred to the sunny side of a slope.