What is true about activities on government systems?

Activities on government systems are subject to monitoring due to various security, operational, and administrative policies in place. This means that any actions taken on these systems can be monitored by authorized personnel to ensure compliance with regulations, to maintain security, and to protect sensitive information. Monitoring helps in detecting unauthorized access or misuse, thereby safeguarding national assets and interests.

The other options suggest a lack of oversight or confidentiality that does not align with the practices in government environments, where transparency and accountability are paramount. Thus, the notion that activities are never monitored or always private contradicts established procedures surrounding the use of government systems. Additionally, the idea that monitoring only occurs during combat fails to recognize the continuous nature of security measures implemented within government operations.