Which groundbreaking product marketing innovation did Lockheed Martin first use in 1943 that revolutionized how military aircraft were sold to Allied governments?

During World War II, product marketing played a crucial role not just in selling consumer goods, but also in military recruitment and equipment sales. One revolutionary advertising technique forever changed how military products were marketed to governments. This poll tests your knowledge of a pivotal moment in military product marketing history that continues to influence defense industry practices today.

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The "Comparative Combat Demonstration" - live aerial dogfights between different aircraft models with government officials observing
The "Performance Guarantee Program" - money-back guarantees if aircraft didn't meet specified combat performance metrics
The "Pilot Endorsement Campaign" - using testimonials from decorated fighter aces in print advertisements
The "Technical Superiority Roadshow" - traveling exhibitions with cutaway models showing advanced engineering features