Final answer:
In contemporary forms of internal alchemy, Jing plays the role of a vital source of energy that is preserved and cultivated.
Step-by-step explanation:
In contemporary forms of internal alchemy, Jing is considered to be a source of vital energy that should be preserved and cultivated (A). In the Daoist tradition, Jing, along with Qi and Shen, forms a triad of vital substances necessary for spiritual progression and achieving harmony with the Dao. Preserving and transforming Jing into higher forms of energy is a foundational practice in Daoist inner alchemy. This concept aligns with the Daoist ideal of living in accordance with the natural way of things and harmonizing with the cycles of the universe.