Respuesta :
Answer:
D. They were a network of roads controlled by the local governments is the correct answer.
Explanation:
The trade routes which went from China to Eastern Europe along the borders of China, India, Persia and ended near Turkey and Mediterranean sea was known as Silk Routes. It was used for trade silk, salt, porcelain and spices. It was called silk route because silk was the major product which was traded from china and was in demand around the world. The silk road was in operation even before the silk the Han dynasty opened trade with the west. One of major routes of silk road was the Persian royal road that was established during the Achaemenid Empire. The route was in operation from 130 BC till 1453.
