Which shopping habit/retail strategy was NOT developed or significantly accelerated as a result of World War II rationing and resource limitations?

Throughout history, major military conflicts have significantly altered consumer behavior and retail strategies. World War II, in particular, revolutionized shopping habits and forced retailers to adapt to unprecedented challenges. This trivia question explores how wartime necessity shaped modern retail practices that continue to influence consumer trends today. Test your knowledge of how military history intersected with retail innovation!

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Self-service supermarkets (replacing clerk-assisted shopping)
Loyalty card programs with personalized discounts
Frozen food as a mainstream consumer product
Standardized packaging to reduce material waste