Which retailer pioneered the first successful self-service grocery store format in 1916, revolutionizing retail by allowing customers to select their own products without clerk assistance?

The retail landscape we know today was shaped by pivotal innovations throughout history. One such revolutionary concept fundamentally changed how consumers interact with products and dramatically improved store efficiency. This trivia question explores a groundbreaking retail format that transformed shopping from a clerk-assisted experience to the self-service model that dominates modern retail. Test your knowledge of this historic retail innovation!

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Piggly Wiggly, founded by Clarence Saunders in Memphis, Tennessee
A&P (Great Atlantic & Pacific Tea Company), founded by George Gilman in New York
Safeway, founded by Marion Barton Skaggs in American Falls, Idaho
Kroger, founded by Bernard Kroger in Cincinnati, Ohio