Which American entrepreneur is credited with inventing the world's first true self-service grocery store in 1916, revolutionizing retail by allowing customers to select their own merchandise?

Before the 1910s, shopping looked very different from what we know today. Store clerks would retrieve items for customers from behind counters, with products displayed in glass cases or on shelves out of customers' reach. This poll tests your knowledge about a fundamental innovation that transformed the retail landscape and shaped the modern shopping experience we take for granted.

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Clarence Saunders (Piggly Wiggly)
Frank Woolworth (F.W. Woolworth Company)
Sebastian Kresge (S.S. Kresge Company/Kmart)
James Cash Penney (J.C. Penney)