Which retail analytics milestone holds the Guinness World Record for 'largest data set used for retail personalization'?

The retail industry has achieved some remarkable world records over the years. From the largest shopping malls to the most expensive products ever sold, these achievements showcase the extraordinary scale and innovation in retail. Test your knowledge about how retail brands and products have made their way into the record books with this challenging trivia question about retail data analytics and world records.

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Walmart's 2018 customer behavior analysis processing 2.5 petabytes of data daily
Amazon's 2020 recommendation engine analyzing 1 billion product interactions per hour
Alibaba's 2019 Singles' Day processing of 544,000 transactions per second
Target's 2017 predictive analytics model tracking 287 million unique customer profiles