The Tang helped promote buddhism throughout China by a. Officially banning all other belief systems
b. Mandated the Buddhist themes be included on all Civil Service Exams
Provided tax breaks for lands with Buddhist temples
d. Adopting the Buddhist Calendar as the official Chinese calendar
C.

Option A

Explanation:

In early days of China, the belief of Confucianism was prevailing that later disillusioned (disappointed) people and was unable to keep order in China and following this the empire of China broke into smaller pieces. People got embraced with Buddhism, a new religion as it believes on "end to suffering"

Later on, Buddhism was officially made the one and only belief system of China.

Hence, option A is correct

muslims have taken his goods and products to different parts of asia an indonesia. sometimes just traveled and trade, but in other occasions, stayed in the place and made a living.

trade was the key for muslims economies to prosper. their commerce routes reached far places like malaysia and java in the 11th century.

another important factor for prosperity was that muslim states served as the middle point for european traders.

they used to travel by land but sailing the seas -the indian ocean- really increase the exportation of products.