Which inventory management technology has most significantly reduced 'phantom inventory' issues in sports retail stores in the past five years?

The sports retail industry has undergone significant transformation in recent years. From the rise of direct-to-consumer models to innovative in-store experiences and supply chain improvements, sports retailers are adapting to changing consumer preferences and technological advancements. This trivia question focuses on one key inventory management innovation that has revolutionized the sports retail landscape.

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RFID (Radio-Frequency Identification) tagging systems
QR code scanning by customers
Manual weekly inventory audits
Blockchain-based inventory ledgers