Which retail innovation, first introduced in 1916 by Clarence Saunders, allowed customers to select their own merchandise without clerk assistance and is considered the precursor to modern supermarkets?

The history of retail has been marked by technological breakthroughs that fundamentally changed how consumers shop. One particular innovation from the early 20th century revolutionized the entire shopping experience and laid the groundwork for modern supermarkets and self-service retail. Test your knowledge about this pivotal moment in retail history that transformed consumer behavior forever.

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Piggly Wiggly self-service store
A&P catalog ordering system
Woolworth's price-marked merchandise
Sears automated checkout counters