Which customer feedback technique did Lay's use for its 'Do Us A Flavor' campaign that revolutionized food product development?

In today's competitive food industry, customer feedback mechanisms can make or break a product's success. Companies are constantly innovating ways to collect valuable insights from consumers about their food products. This trivia question tests your knowledge of a revolutionary customer feedback technique that changed how a major food company develops new flavors. Think you know how the biggest flavor innovations reach our shelves?

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Crowdsourced flavor competition where consumers submitted and voted on new potato chip flavors
In-store taste testing with immediate digital feedback terminals
AI-powered flavor preference algorithm based on social media activity
Celebrity chef collaboration program with fan voting