Which retail innovation did the World Wildlife Fund pioneer in 2019 that allowed customers to 'adopt' endangered animals through augmented reality tracking of actual animals in the wild?

In the competitive world of wildlife conservation fundraising, organizations must create memorable campaigns to stand out. One revolutionary marketing approach in 2019 changed how conservation organizations engage with donors worldwide, setting new standards for transparency in showing exactly how donations impact animal protection efforts. Test your knowledge of this game-changing retail innovation that transformed wildlife conservation fundraising!

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WildScan - AR tracking bracelets that showed donors the real-time location and activities of their adopted animal
EcoTracker - QR-enabled plush toys that unlocked exclusive documentary footage of the adopted species
Guardian Program - Monthly subscription boxes containing products made by communities protecting wildlife habitats
Digital Twin - NFT certificates of adopted animals that increased in value as the species' population recovered