Which term refers to a DoD unit, organization, or installation performing a function or mission?

• A. Access
• B. Activity
• C. Adjudicator
• D. Adversary

Answer: (B)

The term used to designate a DoD unit, organization, or installation that performs a function or mission is activity. This label encompasses any organizational element that carries out a specific responsibility, such as a base, command, or installation operating a program or function. Access, on the other hand, relates to permission or entry to resources or areas, not the entity doing the work. An adjudicator is the person who makes decisions on classifications or security matters, and an adversary is an opposing force or threat actor. Therefore, activity best fits the description.