**Core Concept**
The Systematic Trauma Evaluation and Planning Score (STEPS) is a clinical tool used to assess and prioritize patients with trauma. It involves a rapid and systematic evaluation of the patient's vital signs, injuries, and other factors to determine the severity of their trauma and guide further management.

**Why the Correct Answer is Right**
The STEPS approach is a standardized method for evaluating trauma patients, which helps healthcare providers identify potential life-threatening injuries and prioritize their treatment. It involves a series of questions and physical examinations to assess the patient's airway, breathing, circulation, disability, and exposure (the "ABCDE" approach). This systematic evaluation helps healthcare providers quickly identify patients who require immediate attention and intervention.

**Why Each Wrong Option is Incorrect**
* **Option A:** STEPS is not used for evaluating patients with chronic illnesses, but rather for trauma patients.
* **Option B:** The Advanced Trauma Life Support (ATLS) program is a comprehensive training program for healthcare providers, but STEPS is a specific tool used within the ATLS approach.
* **Option D:** The Trauma Score is a different clinical tool used to evaluate trauma patients, but it is not the same as STEPS.

**Clinical Pearl / High-Yield Fact**
The STEPS approach is a critical component of trauma care, and healthcare providers should be familiar with its components and how to apply them in a clinical setting.

**Correct Answer:** C. Assessing trauma patients.