Which ancient civilization first used branded clay seals as an early form of retail 'logo' to authenticate and identify products in marketplace transactions?

Before modern retail stores and e-commerce, ancient civilizations had sophisticated marketplace systems with their own version of 'branding' and customer loyalty. From the Agoras of Greece to the Forums of Rome and the bazaars of Mesopotamia, merchants developed distinctive techniques to stand out. This trivia challenges your knowledge about how ancient sellers differentiated themselves and built customer relationships in the earliest known retail environments.

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Ancient Mesopotamia (circa 3000 BCE)
Ancient Egypt (circa 2500 BCE)
Ancient China (circa 1500 BCE)
Ancient Greece (circa 800 BCE)