Final answer:
Depositing a company's personnel accountability roster with the entry officer or command post indicates that the company has arrived on scene. (Option C).
Step-by-step explanation:
Depositing a company's personnel accountability roster with the entry officer or command post indicates that the company has arrived on the scene.
This procedure is a vital part of incident command system protocols, ensuring that all personnel are accounted for during emergency operations.
The handover of the accountability roster serves as a record that the company's members are actually present and ready to be deployed for various tasks within the hazard area. This practice is crucial for maintaining personnel safety and effective incident management.
Hence, the correct answer is Option C.