Which famous consumer products company designed the P-51 Mustang aircraft's cooling system during WWII, advertising this achievement with the slogan 'When it's too hot for comfort'?

During World War II, several consumer product companies pivoted their manufacturing capabilities to support the war effort, creating military equipment and supplies. Some of these product designs became legendary for their ingenuity and effectiveness, while the marketing campaigns highlighting these patriotic contributions boosted brand loyalty for decades afterward. Test your knowledge about one of the most iconic product design shifts in military history!

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Prestone Antifreeze (National Carbon Company)
Harrison Radiator Division (General Motors)
Packard Motor Company
Coolidge Radiator Company (Owned by Ford)