Which Amazon innovation, launched in 2005, significantly changed retail delivery expectations and later became a cornerstone of its competitive advantage?

Amazon has fundamentally transformed retail and consumer behavior since its founding in 1994. This trivia question examines a specific milestone in Amazon's journey that significantly impacted traditional retail models and accelerated e-commerce adoption. Test your knowledge of how this retail giant disrupted established market patterns and forced competitors to adapt to a new digital-first reality.

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Amazon Prime (offering unlimited free two-day shipping for an annual fee)
Amazon Marketplace (allowing third-party sellers on the platform)
One-Click Ordering (patented 1-click purchase technology)
Amazon Web Services (AWS cloud computing platform)