Which food preservation technology, first commercialized in the 1930s, revolutionized retail by allowing year-round access to previously seasonal foods and creating entirely new product categories?

The food retail industry has undergone numerous technological revolutions throughout history, dramatically changing how products reach consumers and how long they remain fresh. One particular innovation transformed the entire supply chain management of perishable foods, creating entirely new product categories and revolutionizing global food distribution. Test your knowledge about this game-changing development in food retail history!

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Flash freezing (the Birdseye method)
Vacuum sealing
Modified atmosphere packaging
High-pressure processing