Which innovative supply chain solution was developed by the Allies in 1944 to fuel the rapid advance of their armies following the D-Day invasion?

During World War II, logistics and supply chains were often as decisive as battlefield tactics. The ability to move equipment, ammunition, food, and medical supplies efficiently across continents and oceans determined the success or failure of military operations. This trivia question tests your knowledge about one of the most remarkable supply chain innovations that helped the Allies secure victory in Europe.

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Operation PLUTO (Pipe-Lines Under The Ocean) - underwater pipelines to pump fuel from England to France
The Berlin Airlift - using aircraft to deliver supplies directly to forward combat units
Liberty Ships - mass-produced cargo vessels designed to resupply troops more efficiently
Red Ball Express - a convoy system using exclusively Sherman tanks modified to carry supplies