Which inventor is credited with creating the world's first self-service grocery store (Piggly Wiggly) in 1916, fundamentally changing retail by allowing customers to select their own merchandise?

The retail landscape has been shaped by groundbreaking inventions and discoveries throughout history. One of the most transformative retail innovations fundamentally changed how consumers interact with products, eliminating the need for clerk assistance for every purchase. This innovation revolutionized shopping efficiency and dramatically reduced operating costs for retailers, paving the way for the modern shopping experience we know today. Test your knowledge about this pivotal retail breakthrough!

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Clarence Saunders
Frank Woolworth
Sebastian Kresge
Michael Cullen