Which of these popular consumer food products was originally developed specifically for US military use during World War II before becoming a commercial success?

Throughout military history, combat rations have evolved from simple preserved foods to sophisticated meal systems. Some military food innovations have been so successful they've crossed over into civilian markets and become iconic consumer products. This poll tests your knowledge about a famous product that originated as military sustenance but became a household name worldwide.

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M&M's chocolate candies
Spam canned meat
Tang powdered drink mix
Twinkies snack cakes