Which ancient civilization pioneered the first known standardized retail pricing system with fixed price tags, eliminating the need for haggling in certain establishments?

Long before modern retail chains and e-commerce platforms, ancient civilizations developed sophisticated systems for trade and commerce. From the bustling agoras of Greece to the complex trade networks of Mesopotamia, the foundations of retail were established thousands of years ago. This trivia question explores a fascinating aspect of retail history in the ancient world - test your knowledge about how our ancestors approached product distribution and sales!

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Roman Empire (under Emperor Diocletian's Edict on Maximum Prices in 301 CE)
Mesopotamian Babylonians (under King Hammurabi's market regulations)
Ancient Egyptians (in New Kingdom period marketplaces)
Han Dynasty China (through government-regulated silk and salt monopolies)