In retail history, which innovation first introduced the concept of self-service shopping where customers could select their own merchandise without clerk assistance?

Test your knowledge about the evolution of retail history! Throughout the centuries, shopping has transformed from simple bartering to complex digital experiences. This poll explores a pivotal moment in retail history that fundamentally changed how people shopped and established patterns we still see today. Think you know your retail history? Let's see if you can identify when the retail landscape forever changed with this innovation.

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Piggly Wiggly stores (1916)
Woolworth's five-and-dime stores (1879)
Sears Roebuck mail-order catalog (1893)
Marshall Field's department store (1852)