Which innovative product design technique was NOT used in Operation Fortitude, the Allied deception campaign that helped ensure D-Day's success?

During World War II, product packaging and strategic deception played a crucial role in military operations. One of the most successful military deception campaigns was Operation Fortitude, which protected the actual D-Day landings by convincing German forces that the main Allied invasion would occur elsewhere. This campaign involved elaborate product staging, including inflatable tanks, fake military equipment, and simulated radio traffic. Test your knowledge about this fascinating intersection of military history and product deception!

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Inflatable Sherman tanks made of rubber that could be quickly deployed and relocated
Specially designed radar reflectors that mimicked large naval vessels on German radar screens
Temperature-controlled uniform packaging that disguised thermal signatures from aerial reconnaissance
Fake landing craft made of wood and canvas visible to German reconnaissance planes