**Core Concept**
The four-color code system of triage management in disaster is a method used to prioritize patients based on the severity of their injuries and the availability of medical resources. This system helps emergency responders to allocate their resources effectively and provide the best possible care to those in need.

**Why the Correct Answer is Right**
The four-color code system uses the following colors: Red, Yellow, Green, and Black. The Black color code is used for patients who are deceased or have injuries that are so severe that they cannot be treated in the field. These patients are often beyond medical help and are prioritized last or not at all. This allows emergency responders to focus on patients who have a greater chance of survival.

**Why Each Wrong Option is Incorrect**
* **Option A:** Incorrect because the Red color code is used for patients with life-threatening injuries who require immediate medical attention.
* **Option B:** Incorrect because the Yellow color code is used for patients with minor injuries who can be treated in a delayed manner.
* **Option C:** Incorrect because the Green color code is used for patients who are walking wounded and can be treated immediately.

**Clinical Pearl / High-Yield Fact**
Remember the "ABCDE" mnemonic to recall the correct order of triage colors: A (Amber) is not used in the four-color system, so the correct sequence is Red, Yellow, Green, and Black.

**Correct Answer: D.**