Why is Qin Shi Huangdi considered an important figure in world history

A. He authored the Shiji, the first official history of China, to unite the people
B. He discovered tea when he tried a mixture of leaves with boiling water
C. He invented the crossbow and improved long ranged combat in warfare
D. He made standard currency, laws, roads and writing to promote unity.

D. He made standard currency, laws, roads, and writing to promote unity.

Qin Shi Huangdi is considered an important figure in world history because he was the first emperor to unify China under one centralized government. He implemented a series of reforms that helped to standardize various aspects of Chinese society, such as currency, laws, roads, and writing. These reforms played a crucial role in promoting unity and efficiency within the empire. Additionally, his construction of the Great Wall of China and his army of terracotta warriors are also significant achievements that highlight his influence on Chinese history.