Which retail innovation, first implemented in 1916, revolutionized shopping by introducing the self-service concept where customers could select their own merchandise?

Before modern supermarkets became the norm, shopping was a completely different experience. Store clerks would retrieve items for customers from behind counters, limiting product discovery and slowing down the shopping process. One retail innovation fundamentally changed this model forever, creating the self-service shopping experience we take for granted today. Test your knowledge about this pivotal moment in retail history that transformed how we shop.

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Piggly Wiggly stores, which pioneered the first true self-service shopping experience with open shelves and checkout counters
Woolworth's five-and-dime stores, which introduced browsable merchandise displays that customers could touch before purchase
A&P Economy Stores, which created the first standardized shopping layout with designated aisles and categories
Marshall Field's department store, which introduced shopping carts and allowed customers to carry their selections throughout the store