Which retail pioneer invented the world's first self-service shopping method in 1916, allowing customers to select their own items without clerk assistance?

Retail innovation has transformed how we shop throughout history. One of the most significant developments in retail was the introduction of self-service shopping, where customers could select their own items without clerk assistance. This revolutionary concept forever changed the retail landscape, leading to modern supermarkets and big-box stores. Test your knowledge about this pivotal retail innovation that shaped modern commerce and consumer behavior!

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Clarence Saunders with Piggly Wiggly stores
Sebastian Kresge with S.S. Kresge stores (later Kmart)
Frank Woolworth with Woolworth's five-and-dime stores
James Cash Penney with J.C. Penney department stores