Answer:
a. Paper
Step-by-step explanation:
The Han dynasty followed the Qin dynasty and preceded the period of the Three Kingdoms in China from 206 BC. C. until 220 d. C .. During the Han Dynasty, their kings adopted the teachings of the great philosophers of antiquity, Lao-Tse and Confucius. The government developed well, achieving territorial expansion. Education and writing were encouraged in the newly invented rice paper. A great exchange of merchandise was promoted by the Silk Road, which goes from the Pacific Ocean to Persia and India. China officially became a Confucian state and flourished internally: agriculture, handmade products and trade flourished, and the population reached 50 million. Meanwhile, the empire extended its cultural and political influence over present-day Vietnam, Central Asia, Mongolia and Korea before collapsing under a combination of internal and external pressures.