Which ancient civilization invented the first known retail display shelving system with standardized measurements to organize and showcase goods in marketplace stalls?

Before modern shopping malls and e-commerce platforms, ancient civilizations developed sophisticated marketplaces and retail innovations that laid the groundwork for today's commerce. From the agoras of Greece to the forums of Rome and the bazaars of Mesopotamia, retail spaces were hubs of innovation and social interaction. This poll tests your knowledge about one particularly groundbreaking retail innovation from the ancient world that revolutionized how merchants displayed and sold their products.

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Ancient Egyptians, who created tiered papyrus display stands in the markets of Memphis around 2500 BCE
Phoenicians, who developed cedar wood modular display cases for their trading ports around 1200 BCE
Romans, who implemented the 'tabernae' system with standardized stone counters and display niches in 200 CE
Ancient Chinese, who created the 'silk market stands' with bamboo display racks during the Han Dynasty