Which ancient civilization first introduced standardized weights and measures for retail trade, revolutionizing customer trust and experience in marketplaces?

The ancient world was filled with remarkable commercial innovations that shaped how people bought and sold goods. From the bustling agoras of Greece to the complex trade networks of Mesopotamia, ancient civilizations developed sophisticated retail concepts that would influence commerce for millennia. This trivia question explores one of the most significant retail innovations that transformed the customer experience in antiquity - one that we still see echoes of today!

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Ancient Egypt, with their nilometers and standardized grain measures around 3000 BCE
Mesopotamia (Sumeria), with their cuneiform-documented standard weights system around 3500 BCE
Indus Valley Civilization, with their precisely manufactured measuring cubes around 2600 BCE
Ancient China, with standardized bronze weights from the Xia Dynasty around 2100 BCE