What are the three broad categories of exploitable operations security vulnerabilities?

The correct selection identifies the key areas related to operations security vulnerabilities, focusing on telephones, radio communications, and the physical environment.

These three categories encapsulate common points where sensitive information can be intercepted or misused in the context of aviation operations. Telephones and radio communications are critical as they are often used in operational discussions and can be targets for unauthorized listening or interception. The physical environment, including the locations where operations take place, can also be a source of vulnerabilities if not properly secured. This can involve unauthorized access to sensitive areas or the observation of operations in progress, which could lead to the compromise of operational security.

Each of these areas directly relates to the potential for exploitation, making them vital components in the assessment of security vulnerabilities within aviation operations.