Which retail innovation, introduced in the 1850s, revolutionized shopping by being the first to implement fixed pricing, open displays, and allowing customers to browse freely without obligation to purchase?

The history of retail has transformed how humans exchange goods and services. From ancient marketplaces to today's digital storefronts, retail giants have pioneered innovations that changed commerce forever. This trivia question focuses on a pivotal moment in retail history that revolutionized the shopping experience and set standards still influencing modern retail concepts. Test your knowledge about the historical foundations of today's retail landscape!

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Le Bon Marché in Paris, considered the first modern department store
Marshall Field's in Chicago, pioneer of the 'give the lady what she wants' customer service philosophy
Selfridges in London, first to place perfume counters at the front of the store
The Great Bazaar of Constantinople, which introduced the concept of merchandise categorization