Which 19th century retail innovation first introduced the concept of "customer experience" by allowing shoppers to browse freely without obligation to buy?

In the evolution of retail history, certain innovations fundamentally transformed how businesses interacted with customers. Before modern technology, retailers pioneered customer experience strategies that we still see echoes of today. This poll explores a pivotal moment in retail history that revolutionized customer experience and set standards for generations of businesses to follow. Test your knowledge of how historical retail innovations shaped today's consumer expectations!

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Department stores with their "open floor" browsing policy
Mail-order catalogs with money-back guarantees
General stores with credit account systems
Traveling salesmen with product demonstrations