Why was the Grand Canal so important to the infra-structure of China?

The canal was built in order to easily ship grain from the rich farmland in southern China to the capital city in Beijing. This also helped the emperors to feed the soldiers guarding the northern borders. The Ancient Chinese built early canals to help with transportation and commerce. but also he Grand Canal connects the two Rivers systems.The Canal helped to united China into one unified nation. The Canal provided a means of commerce and transportation between North China and Southern China. Ships could move between the two major river systems of China because of the Grand Canal

Explanation:

your answer will be b. improving roads, bridges, and other infrastructure. hope i !