Which innovative transportation logistics system did Amazon first patent in 2016 that involves airborne fulfillment centers using drones for delivery?

E-commerce has dramatically transformed the transportation and logistics industry, with Amazon leading much of this revolution. This poll tests your knowledge of how Amazon's innovations have changed the way products move from warehouses to customers, creating new standards and expectations in the transportation sector. Test your knowledge of this intersection between e-commerce platforms and transportation logistics!

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Airborne Fulfillment Centers (AFCs)
Prime Air Express Network (PAEN)
Stratospheric Delivery System (SDS)
Aerial Distribution Centers (ADCs)