Which retail innovation was first introduced at airports in the 1940s and fundamentally transformed the transportation retail experience by creating the concept of 'travel retail'?

The transportation industry has seen remarkable retail innovations that transformed the customer experience while traveling. From airport shopping plazas to train station boutiques, retail strategies in transit hubs have evolved significantly. This poll tests your knowledge about a pioneering retail concept that revolutionized how travelers shop and experience brands while on the move. Can you identify the correct retail innovation that changed the transportation landscape?

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Duty-free shopping
Airport food courts
Self-checkout kiosks
Airport loyalty programs