**Core Concept**
In disaster management, prioritizing the immediate needs of victims is crucial to prevent further morbidity and mortality. This involves triage, rehabilitation, and disaster response, but mass vaccination may not always be a priority in the immediate aftermath.

**Why the Correct Answer is Right**
Mass vaccination is not typically practiced in the initial stages of disaster management. The primary focus is on providing basic medical care, including wound management, hydration, and shelter. Vaccination programs are usually implemented later, after the immediate crisis has been addressed and the victims have been stabilized. This is because the primary concerns in disaster management are addressing life-threatening injuries and preventing the spread of infectious diseases that may be more relevant in the short term.

**Why Each Wrong Option is Incorrect**
**Option A:** Triage is a critical component of disaster management, as it enables medical personnel to prioritize patients based on the severity of their injuries and allocate resources effectively.

**Option B:** Rehabilitation is an essential aspect of disaster management, as it helps victims recover from their injuries and return to their normal lives. This includes providing psychological support, prosthetics, and physical therapy.

**Option D:** Disaster response is the initial phase of disaster management, which involves providing immediate assistance to victims and mitigating the impact of the disaster.

**Clinical Pearl / High-Yield Fact**
In disaster management, the "Golden Hour" principle is crucial, where prompt medical attention within the first hour of injury can significantly improve outcomes. This highlights the importance of prioritizing timely medical care in the face of a disaster.

**Correct Answer:**
✓ Correct Answer: C. Mass vaccination.