Which ancient civilization first developed a standardized product rating system where customers could leave feedback about merchant quality using clay tokens?

Before modern shopping malls and e-commerce platforms, ancient civilizations created sophisticated marketplaces that revolutionized commerce. These early retail innovations established foundational principles still used in product development and customer engagement today. Test your knowledge about how ancient societies approached retail and product innovation!

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Mesopotamian merchants (circa 3000 BCE)
Roman market inspectors (circa 100 CE)
Chinese Han Dynasty administrators (circa 200 BCE)
Egyptian marketplace regulators (circa 1500 BCE)