Final answer:
Sergeants should relieve Patrol units based on specific circumstances which may include emergencies, breaks, direct requests from patrol units, or upon receiving authorization. The exact protocol would be outlined in the department's standard operating procedures.
Step-by-step explanation:
The question 'When should Sergeants "Only" relieve Patrol units?' pertains to specific protocols within police or military operations. Based on the options provided, the most appropriate answer would likely be determined by the procedural manual or standard operating procedures of the law enforcement or military organization in question. Nevertheless, a general understanding suggests that:
- During emergencies: It is reasonable for sergeants to relieve patrol units to manage the situation effectively.
- During breaks: Sergeants may relieve patrol units so they can have their mandated rest periods.
- Only if requested: Sergeants might step in when patrol units request assistance or a substitution.
- Only if authorized: Sergeants should relieve patrol units if they have received explicit authorization from higher-ranking officials.
In practice, the correct answer might encompass more than one of these situations, contingent on the specific context and the regulations of the institution. Yet, without clear guidelines from an authoritative source, any answer would be speculative and may not be applicable to all situations. Therefore, to provide a precise answer, accessing the organization's policies or directives would be essential.