Which ancient civilization invented the first known retail shelving system with graduated display tiers specifically designed to showcase different qualities of goods?

Before modern retail displays and visual merchandising, ancient civilizations developed sophisticated methods to showcase their goods in marketplaces. From the agoras of Greece to the forums of Rome and the bazaars of Mesopotamia, merchants employed various techniques to attract customers and display wares effectively. This trivia challenges your knowledge about how ancient societies pioneered retail visual storytelling techniques that still influence modern commercial displays today.

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Ancient Egyptians, who created stepped display platforms in their marketplaces to showcase papyrus quality grades around 1500 BCE
Roman merchants, who developed the 'gradus mercatus' (market steps) system for wine and olive oil display around 100 CE
Mesopotamian traders, who used the 'ziggurat display' concept in Babylonian markets for textile merchandising around 600 BCE
Ancient Chinese merchants of the Han Dynasty, who created the 'tiered silk road display' technique for luxury goods around 200 BCE