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

The retail landscape has evolved dramatically over centuries, with several innovations fundamentally changing how consumers interact with products and brands. One particular development in the early 20th century revolutionized the entire shopping experience, transforming retail from clerk-assisted sales to the self-service model we know today. Test your knowledge of this pivotal moment in retail history that changed consumer behavior forever and set the foundation for modern shopping experiences.

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Piggly Wiggly's self-service grocery store
Woolworth's five-and-dime store concept
Sears Roebuck's mail-order catalog
Marshall Field's department store with fixed pricing