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

Throughout history, retail formats have evolved dramatically, transforming how people shop and how merchants sell. From ancient marketplaces to modern department stores, each innovation has shaped consumer culture. This trivia question explores a pivotal moment in retail history that forever changed the shopping experience and set the foundation for modern retail environments we know today. Test your knowledge about a revolutionary retail concept that transformed commerce!

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Self-service grocery stores (Piggly Wiggly)
Department stores (Bon Marché)
Mail-order catalogs (Montgomery Ward)
Five and dime stores (Woolworth's)