Which ancient civilization first implemented a standardized currency with retail price controls, creating the world's first regulated marketplace system?

Long before modern shopping malls and e-commerce, ancient civilizations developed sophisticated retail systems that revolutionized how goods were traded. From the grand bazaars of Mesopotamia to the complex market networks of Rome, retail innovation shaped economies and societies. This trivia question explores a groundbreaking retail concept that changed commerce in the ancient world and established principles still relevant in today's retail landscape.

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Roman Empire under Emperor Diocletian (301 CE)
Han Dynasty China under Emperor Wu (118 BCE)
Mauryan Empire under Ashoka (250 BCE)
Ancient Egypt under Pharaoh Ptolemy II (275 BCE)