The correct answer is D) relatively free, and different religions flourished.
Under the Tang, religion was relatively free, and different religions flourished.
During this dynasty, Taoism was the official religion in China. It was based on the religious teachings of Laozi, but also took into consideration the teachings of Buddhism and other religious teachings and principles.
The basic element of Taoism was the idea that humans needed to live in harmony with the environment and other beings and had to respect the flow of the Cosmos and the designs of the universe.