Which inventor is credited with creating the first self-service store layout in 1916, fundamentally changing how customers interact with products and establishing the foundation for modern supermarkets?

Store layouts have evolved dramatically over the centuries, transforming from simple market stalls to sophisticated shopping environments designed to maximize sales and enhance customer experience. Behind many retail innovations were brilliant minds who forever changed how we shop. This trivia question explores a groundbreaking layout invention that revolutionized the retail industry and remains influential today.

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Clarence Saunders (Piggly Wiggly founder who patented the 'self-serving store' concept)
Frank Woolworth (Five-and-Dime stores pioneer who introduced open product displays)
Michael Cullen (King Kullen founder often credited as America's first supermarket creator)
Sebastian Kresge (S.S. Kresge store founder who innovated department-based shopping layouts)