Wat economic strategy did roosevelt use to convert the us economy to wartime production rapidly

During the second world war, the US government took strong measures to convert the economy to meet the demands of war. President Roosevelt established an organizations like:
1.) War Production Board whose task was to convert industries from peace time works to war needs, allocate scarce material, establish priorities in the distribution of materials and services.
2.) Office of Civilian defense was also established and were tasked to coordinate state and federal measure for the protection of civilians in times of war.
3.) Civil Air Patrol (CAP) was also created for search and rescue missions.
4.) Civil Defense Corps which organized millions of volunteers to fight fires , decontaminate following chemical weapon attacks, and provide first aid.

Gotta be D. Right???