Which ancient civilization developed the first known standardized product grading system for their marketplace goods around 3000 BCE?

Before modern e-commerce platforms revolutionized retail, ancient civilizations developed sophisticated trading systems and marketplaces. These early commercial innovations laid the groundwork for today's global commerce. Test your knowledge about product development and trading platforms in the ancient world, where the foundations of modern retail were established thousands of years ago.

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Mesopotamians, who created clay tablet quality certificates for different grades of wool and textiles
Ancient Egyptians, who used hieroglyphic seals to denote the quality tiers of papyrus products
Indus Valley merchants, who stamped pottery with symbols indicating material purity and craftsmanship level
Early Chinese traders, who developed a silk classification system with different quality indicators