Which of these retail strategies was genuinely employed by merchants in ancient civilizations?

Before modern retail analytics and e-commerce, ancient civilizations developed sophisticated commercial strategies to engage consumers and promote trade. From the bustling bazaars of Mesopotamia to the complex trading networks of Rome, ancient merchants pioneered retail techniques that would influence commerce for millennia. This trivia challenges you to identify which innovative retail strategy was truly practiced in the ancient world, separating historical commerce fact from fiction.

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Phoenician traders used distinctive animal-shaped brand seals to mark their premium products, creating the first recognizable 'brand mascots' for Mediterranean consumers
Egyptian merchants implemented an early loyalty program where customers collected papyrus stamps to redeem for discounts on future purchases at royal marketplaces
Roman retailers used color-coded pricing tiers, with purple-marked items representing premium goods available only to patrician customers
Mesopotamian bazaars featured designated 'sample stations' where shoppers could test food products before purchase, documented in early cuneiform tablets