Which retail innovation, introduced in 1916, revolutionized shopping by allowing customers to select their own merchandise without clerk assistance for the first time?

The history of retail has seen remarkable innovations that shaped how consumers shop today. From ancient marketplaces to modern retail strategies, revolutionary ideas transformed commerce throughout the centuries. This trivia question focuses on a pivotal moment in retail history that fundamentally changed consumer shopping behavior and set the foundation for modern retail experiences. Test your knowledge about this transformative retail innovation!

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Piggly Wiggly's self-service grocery store
Macy's department store window displays
Sears Roebuck mail-order catalog
F.W. Woolworth's five-and-dime store concept