Which retail innovation, introduced in 1916 by Clarence Saunders, revolutionized shopping by allowing customers to select their own merchandise rather than having clerks retrieve items from behind counters?

The history of retail contains fascinating innovations that transformed how we shop. From small general stores to modern mega-retailers, the evolution of retail sales techniques and technologies has shaped consumer culture worldwide. This trivia question focuses on a pivotal moment in retail history that revolutionized the shopping experience and created the foundation for modern retail as we know it today. Test your knowledge about this significant retail innovation!

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Piggly Wiggly self-service stores
Montgomery Ward mail-order catalog
Woolworth's five-and-dime stores
A&P economy grocery stores