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

The retail landscape has evolved dramatically throughout history, with certain innovations fundamentally changing how consumers interact with brands. This trivia question explores a pivotal moment in retail history that transformed the customer experience and set the foundation for modern shopping practices. Test your knowledge of how retail strategies have evolved over time and shaped consumer behavior!

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Piggly Wiggly's self-service grocery store
Woolworth's five-and-dime store model
Macy's department store layout
Sears, Roebuck and Co.'s mail-order catalog