Which retail innovation, first introduced in 1916, allowed customers to select their own merchandise without clerk assistance, fundamentally changing shopping forever?

Before the 20th century, shopping looked completely different from today's experience. Store clerks would retrieve items for customers from behind counters, and browsing products independently was not an option. This poll tests your knowledge about a revolutionary retail innovation that fundamentally changed how we shop and set the foundation for modern supermarkets and department stores.

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Piggly Wiggly's self-service grocery store model
Woolworth's five-and-dime store concept
Sears Roebuck's mail-order catalog system
Marshall Field's department store with price tags