The development of more complex forms of social organization in Shang China coincided with the mastery of what skill?

Answer: Metalwork

Explanation: Metalworks started in Shang China as early as 2000years BC, the development of more complex forms of social organization in Shang China coincided with the production of Bronze Sculptures. Most of the Bronze works were mainly for religious purposes where the metalworks were used to produce representation of their gods with different inscriptions on the Bronze sculptures. Some of this Bronze sculptures were to commemorate important events that took place earlier in history.