Which groundbreaking invention is widely credited as the critical catalyst that made modern omnichannel retail strategies possible?

The retail landscape has undergone dramatic transformation through innovative discoveries and technological breakthroughs. One of the most significant retail inventions of the modern era has been omnichannel retail strategy, seamlessly connecting physical and digital shopping experiences. Test your knowledge about the pioneering developments that made today's integrated retail reality possible!

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The barcode scanner (1974), which unified inventory tracking across physical and digital channels
The World Wide Web (1989-1991), which created the foundation for e-commerce to complement brick-and-mortar retail
The smartphone (2007), which introduced mobile shopping as a distinct retail channel
RFID technology (1983), which enabled real-time inventory visibility across multiple sales channels