Which ancient civilization invented the first known system of standardized weights for marketplace transactions, revolutionizing fair trade practices?

The first organized retail systems emerged thousands of years ago in ancient civilizations. From the agoras of Ancient Greece to the complex trade networks of Mesopotamia, early retail innovations shaped commerce for millennia to come. This poll explores a fascinating aspect of ancient retail development that continues to influence modern commerce principles. Test your knowledge about how our ancestors conducted business!

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Ancient Egypt, with their 'deben' weight system calibrated to gold and silver values
Indus Valley Civilization, with precisely crafted cubic stone weights in binary ratios
Ancient Rome, with their 'libra' system that standardized weights across the empire
Ancient China, with their 'jin' system based on millet grain measurements