Which client should be triaged as an Expectant Category, Priority 4?

The client who is triaged as an Expectant Category, Priority 4, typically presents with injuries that are beyond the capacity of available resources to treat effectively, particularly in a mass casualty situation. An unresponsive individual, such as the one with a head injury mentioned in this scenario, is often not viable for survival despite medical intervention, especially if immediate treatment is not available and the prognosis is poor.

In emergency triage systems, the Expectant Category is reserved for patients who are unlikely to survive given the extent of their injuries and the current availability of medical resources. This allows care providers to focus their efforts on those individuals who have a higher likelihood of survival with prompt treatment. In contrast, the other options presented entail cases that either indicate the potential for recovery with treatment or have injuries that could be stabilized, making them better candidates for intervention.