Which retail innovation, first introduced in 1916, fundamentally transformed shopping by allowing customers to select their own merchandise without clerk assistance?

The evolution of retail spaces has dramatically transformed how we shop throughout history. From ancient marketplaces to modern shopping experiences, retail layouts have reflected technological, social, and economic changes. This trivia question explores a pivotal moment in retail history that fundamentally changed consumer behavior and set the foundation for modern shopping environments. Test your knowledge about this retail innovation that revolutionized the shopping experience!

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Self-service grocery stores (Piggly Wiggly)
Department stores with multiple sections
Mail-order catalogs with home delivery
Shopping arcades with multiple vendors