Which retail big data strategy has been most effective for observatory gift shops in developing personalized merchandise that increased repeat customer visits by over 40% between 2018-2022?

The retail landscape for astronomy-related products has evolved dramatically in the past decade. Observatory gift shops and astronomy retailers have had to adapt to changing consumer preferences while competing with online giants. This poll tests your knowledge of how successful astronomy retailers have leveraged data analytics to optimize their product development and boost customer engagement. Can you identify the strategy that transformed the industry?

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Using star-viewing pattern data to create merchandise featuring constellations visible during a visitor's birth month
Analyzing visitor demographics to stock products featuring the most popular celestial bodies by age group
Tracking telescope rental data to produce limited edition merchandise of the most frequently viewed cosmic events
Mining social media engagement to determine which astronomical phenomena should be featured on premium merchandise