Which presidential directive established the National Defense Stockpile (NDS) to ensure critical materials availability during national emergencies?

During times of national crisis, the government's ability to manage supply chains becomes critical for public safety and security. From strategic national stockpiles to emergency procurement systems, government supply chain management has evolved significantly over the decades. This poll tests your knowledge about a landmark policy that changed how the U.S. government approaches supply chain resilience in the face of national emergencies.

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The Defense Production Act of 1950
Executive Order 13806 (2017)
The Strategic and Critical Materials Stock Piling Revision Act of 1979
Presidential Policy Directive 21 (2013)