Which innovative marketing strategy helped the World Wildlife Fund (WWF) increase donations by over 300% during their 2018 'Last Selfie' campaign?

In the world of wildlife conservation, marketing strategies can make or break efforts to save endangered species. Organizations must find innovative ways to capture public attention and drive support for conservation initiatives. This trivia question explores a groundbreaking marketing approach that revolutionized wildlife conservation fundraising and awareness. Test your knowledge of how marketing tactics have been successfully applied to protect our planet's most vulnerable creatures!

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They used Snapchat's disappearing content feature to show endangered animals 'disappearing' with captions like 'Don't let this be my #LastSelfie'
They created an augmented reality app that let users take virtual selfies with extinct animals to highlight what we've already lost
They placed life-sized endangered animal cutouts in major cities with QR codes that triggered donation pages when scanned
They partnered with Instagram to create special endangered species filters that donated $1 for every selfie posted with the filter