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

The way we shop today seems obvious—walking through aisles, selecting our own items, and checking out. But this retail model wasn't always the norm. In the early 20th century, a revolutionary retail innovation transformed commerce forever, setting the foundation for modern supermarkets and big-box stores. Test your knowledge about this pivotal moment in retail history that fundamentally changed how consumers interact with products.

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Piggly Wiggly's self-service grocery store model
Woolworth's five-and-dime price standardization
Marshall Field's department store return policy
A&P's grocery delivery subscription service