Which of these retail marketing campaigns holds an official Guinness World Record?

Marketing campaigns can make history not just in sales, but in the record books too! This trivia question challenges you to identify which famous retail marketing campaign officially broke a Guinness World Record. Test your knowledge about these extraordinary promotional efforts that went beyond effective advertising to become certified record-breakers in marketing history.

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IKEA's 2019 'Human Catalogue' campaign where 200 employees memorized the entire product catalogue and served as living reference guides
T-Mobile's 2018 'Human Magenta' campaign that assembled the largest gathering of people wearing a single color (magenta)
Amazon's 2017 'Biggest Unboxing' event featuring a 40-foot tall delivery box in Times Square
Walmart's 2020 'Million Receipt Mountain' display built from genuine customer receipts collected over one week