Which retail innovation, first introduced by Clarence Saunders in 1916, fundamentally transformed shopping by allowing customers to select their own merchandise rather than requesting it from clerks?

The history of retail has shaped not only how we shop but also how businesses operate. This trivia question focuses on one of the most pivotal innovations in retail history that revolutionized the consumer experience in the early 20th century. Test your knowledge about this transformative moment that forever changed the relationship between customers and products.

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The self-service grocery store (Piggly Wiggly)
The department store catalog (Sears Roebuck)
The shopping mall concept (Country Club Plaza)
The discount store model (Woolworth's)