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

Before modern retail giants dominated the marketplace, innovative retail concepts changed how people shopped forever. This trivia question explores a pivotal moment in retail history that fundamentally transformed the consumer experience and created a new business model that would be replicated worldwide. Test your knowledge of retail history and the visionaries who shaped modern shopping habits!

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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
Marshall Field's department store with price tags