Which retail innovation, first implemented in 1916 by Clarence Saunders, fundamentally changed shopping by allowing customers to select their own merchandise without clerk assistance?

The retail landscape has transformed dramatically throughout history, with innovations that forever changed how consumers interact with products and brands. This trivia question focuses on a pivotal moment in retail history that revolutionized the shopping experience and set the foundation for modern retail operations. Test your knowledge about this significant retail innovation that changed consumer behavior and business models!

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Self-checkout kiosks
Piggly Wiggly self-service grocery store
Mail-order catalogs with home delivery
Department store with multiple product categories