Which ancient civilization first developed a standardized 'brand seal' system where merchants stamped their products with unique identifying marks to guarantee quality and origin?

Before modern retail giants, ancient civilizations had their own impressive commercial systems and marketplaces. These early retail environments shaped economic development and cultural exchange for millennia. Test your knowledge about the branding, partnerships, and retail innovations of the ancient world's commercial powers!

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Mesopotamia (specifically Babylonian merchants around 3000 BCE)
Ancient Egypt during the New Kingdom period (1550-1070 BCE)
Classical Greece during the Golden Age (5th century BCE)
The Indus Valley Civilization (2600-1900 BCE)