If the incident commander designates personnel to provide public information, safety, and liaison services, the personnel are collectively referred to as the: a. incident staff. b. executive staff. c. command staff. d. director staff.

The correct answer is option C. "Command Staff".

Explanation:

The concept of "Command Staff" is used by the Incident Command System for Transportation Professionals to describe all the personnel that have a Command function in the traffic case that they are working on it. The Command Staff includes the figures of the Incident Commander, the Public Information Officer, the Safety Officer, and Liaison Officer.

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