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

The retail landscape has evolved dramatically throughout history, with innovations changing how people shop and interact with products. From ancient marketplaces to modern digital platforms, retail has continuously transformed to meet consumer needs and societal changes. This trivia question explores a pivotal moment in retail history that fundamentally altered shopping behaviors and set the stage for modern retail experiences.

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Piggly Wiggly's self-service grocery store
Sears Roebuck's mail-order catalog
F.W. Woolworth's five-and-dime store model
Marshall Field's department store customer service approach