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

Before the 1910s, shopping looked very different! Retail customers would typically give their shopping lists to clerks who would gather items from behind counters or from store rooms. This method changed dramatically with a retail innovation that transformed how we shop. Test your knowledge about this pivotal moment in retail history that shaped modern shopping experiences worldwide.

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Clarence Saunders (Piggly Wiggly)
Frank W. Woolworth (Woolworth's)
Sebastian S. Kresge (Kmart)
John Hartford (A&P)