Which retail innovator first implemented the self-service shopping model in 1916, allowing customers to select their own merchandise without clerk assistance?

The modern retail landscape was shaped by visionaries who transformed how products reach consumers. From small-scale shops to global retail empires, certain innovations forever changed how we shop. This trivia question focuses on a pivotal moment in retail history that revolutionized the consumer experience and set the foundation for modern shopping practices. Test your knowledge about retail pioneers who changed the face of commerce!

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Clarence Saunders (Piggly Wiggly)
Sebastian Kresge (Kmart)
F.W. Woolworth (Woolworth's)
James Cash Penney (JCPenney)