Final answer:
The Secretary of Defense promulgates the Quadrennial Defense Review (QDR), which is a legislatively-mandated review of DOD strategy and priorities.
Step-by-step explanation:
The Quadrennial Defense Review (QDR) is promulgated by the Secretary of Defense, who is an important official in the Department of Defense. The QDR is a legislatively-mandated review of the DOD (Department of Defense) strategy and priorities, providing an assessment of the current and future security environment.