Which retail customer experience innovation holds a Guinness World Record for its unprecedented scale or impact?

The retail industry has seen some truly remarkable achievements worthy of the Guinness World Records. From the largest department stores to the most innovative marketing campaigns, retailers constantly push boundaries to stand out in the competitive marketplace. This trivia poll tests your knowledge about record-breaking retail experiences and operations that have made history in the world of commerce. Can you identify which retail customer experience holds a prestigious world record?

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Dubai Mall's virtual reality center with over 300 interactive experiences
Amazon Go's checkout-free technology implemented across 50 simultaneous store openings
Alibaba's Singles' Day shopping festival, which set the record for highest online sales in 24 hours
Walmart's customer loyalty program with over 500 million verified participants