Which retail innovation, first introduced in 1916, fundamentally changed shopping habits by allowing customers to select their own merchandise without clerk assistance?

The evolution of retail throughout history has transformed how we shop. From ancient marketplaces to modern malls, retail innovations have reflected cultural and economic shifts. This trivia question focuses on a pivotal moment in retail history that fundamentally changed shopping habits and launched a new era in consumer culture. Test your knowledge about this revolutionary development that continues to influence retail operations today!

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Piggly Wiggly's self-service grocery store model
Macy's introduction of the department store concept
Sears Roebuck's mail-order catalog system
F.W. Woolworth's fixed-price 'five and dime' stores