Which customer service innovation most significantly transformed the online military history collectibles market between 2010-2015?

The market for military history collectibles, memorabilia, and replicas has undergone significant transformation in the digital age. One particular e-commerce innovation drastically changed how military history enthusiasts and collectors access rare artifacts and memorabilia. This poll tests your knowledge about a groundbreaking customer service feature that revolutionized the military history collectibles market in the early 2010s.

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Authentication certificates with blockchain verification for WWII artifacts
Virtual reality preview of life-size historical military equipment replicas
Live video authentication service connecting buyers with military historians before purchase
AI-powered rarity scoring system for battlefield excavated items