Which retail technology has been most widely adopted by major military history museums to track visitor engagement patterns with specific exhibits?

Military history museums have evolved significantly in how they engage visitors and analyze visitor behavior. Modern military museums now employ sophisticated retail technologies to enhance the visitor experience and optimize exhibits based on traffic patterns. This poll tests your knowledge about the intersection of military history preservation and retail technology innovation. Can you identify which visitor tracking technology has revolutionized how military museums understand their guests' engagement with historical exhibits?

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Bluetooth-enabled audio guide systems that anonymously track dwell time at exhibits
Thermal imaging sensors integrated into exhibit areas that analyze crowd density and movement
RFID-embedded entry tickets that passively record visitor pathways throughout the museum
Facial recognition cameras that identify returning visitors and their exhibit preferences