Which retail innovation, first implemented in 1916, fundamentally transformed store layouts by introducing the concept of customers selecting their own products without clerk assistance?

The way we shop today seems so natural, but the retail experience has evolved dramatically over time. One of the most significant innovations changed shopping forever by allowing customers to select their own merchandise without assistance from clerks. This revolutionary concept transformed retail layouts, customer behavior, and the entire shopping experience. Test your knowledge about this pivotal moment in retail history that shaped modern commerce!

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• The self-service grocery store (Piggly Wiggly)
• The shopping mall concept (Country Club Plaza)
• The department store elevator (Marshall Field's)
• The checkout counter conveyor belt (Saunders Patents)

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