Which American entrepreneur is credited with inventing the first self-service shopping format in 1916, revolutionizing retail customer experience by allowing customers to select their own products?

Before the 1930s, shopping was a completely different experience - customers would give their shopping lists to clerks who would gather items for them. Then came a retail revolution that forever changed how we shop. Test your knowledge about this pivotal innovation in consumer behavior and retail customer experience that fundamentally transformed the relationship between shoppers and products.

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