Which innovative supply chain management technique did Silk Road merchants develop that is still used in modern retail logistics?

Before modern logistics and global shipping, ancient civilizations created remarkable supply chain networks that shaped history. The Silk Road stands as one of humanity's greatest commercial achievements, connecting East and West for over 1,500 years. This complex trade network influenced not just commerce but cultural exchange, technological innovation, and political development across continents. Test your knowledge about this historical supply chain marvel that predated modern logistics by millennia.

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Caravanserai networks (fortified way stations spaced one day's journey apart, creating a predictable distribution infrastructure)
Satellite tracking of merchant caravans using astronomical calculations
Centralized imperial warehousing with standardized inventory management
Single-source procurement policies requiring exclusive supplier relationships