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

The retail landscape has evolved dramatically over the centuries, with innovations reshaping how consumers interact with products and brands. One of the most significant retail innovations fundamentally changed the customer experience and shopping behavior forever. This poll tests your knowledge of a pivotal moment in retail history that transformed brand positioning, store layouts, and the entire shopping experience. Do you know when and how this revolutionary change occurred?

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The Piggly Wiggly self-service grocery store model
Montgomery Ward's mail-order catalog system
Macy's department store 'open display' concept
A&P's 'economy store' format with standardized pricing