Which WWII supply chain innovation, designed by the British military, revolutionized the delivery of equipment and supplies for the D-Day invasion?

Throughout history, military success has often hinged not just on strategy and courage, but on the complex supply chains that kept armies equipped and fed. From ancient Rome's sophisticated logistics to modern military supply networks, the ability to efficiently move resources has decided the outcome of countless conflicts. Test your knowledge about one of history's most revolutionary military supply chain innovations!

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PLUTO (Pipe Line Under The Ocean) - an underwater pipeline system that pumped fuel across the English Channel
Mulberry Harbors - artificial floating ports towed across the Channel
Red Ball Express - a dedicated truck convoy system that operated 24 hours daily
Liberty Ships - mass-produced cargo vessels that could be built in under 45 days