Which transportation innovation from the 1990s revolutionized retail by enabling the "48-hour delivery promise" that became a cornerstone of modern e-commerce strategy?

The transportation industry has continuously revolutionized retail by enabling new ways to move products from manufacturers to consumers. One innovation in particular transformed retail logistics and customer expectations in the 1990s, creating an entirely new standard for delivery speed and retail personalization. Test your knowledge about this pivotal development in transportation-retail history that continues to shape consumer expectations today.

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Hub-and-spoke distribution systems pioneered by FedEx
Automated warehouse sorting technology from UPS
RFID tracking systems for rail freight containers
Containerized shipping standardization by Maersk