Which of the following best defines a Defense service?

• A. The furnishing of assistance to foreign persons in defense articles, technical data controlled, and military training
• B. Domestic security service provision
• C. Cyber defense of DoD networks
• D. Financial auditing of defense contractors

Answer: (A)

Defense service means providing assistance to foreign persons in relation to defense articles, controlled technical data, or military training. This aligns with how export-control regimes define defense services, covering activities like advising, helping, or training connected to defense articles or controlled data for people outside the country. That’s why this option is the best fit. The other descriptions describe activities that don’t involve offering defense-related help to foreign persons or fall outside the regulatory scope of defense services—domestic security work focuses on internal security, cyber defense of DoD networks is a specific defensive mission, and financial auditing is an administrative function unrelated to defense services.