All of the above options are correct. Books were indeed sold along with other goods on the Silk Road, and libraries were established along the route to store and exchange knowledge. Additionally, new ideas and technologies, such as improved methods of transportation and navigation, were necessary for travel along the Silk Road. Finally, as traders journeyed along the route, they inevitably interacted with people from different regions and cultures, leading to the exchange of ideas and knowledge.
One answer should be correct.
Apologies for the confusion. The correct answer is: Traders shared ideas as they traveled. Traders played a crucial role in the spread of ideas along the Silk Road as they interacted with people from different regions, exchanged goods, and shared information, knowledge, and cultural practices.
