**Core Concept:**
In patients with blunt abdominal trauma, the initial assessment involves evaluating vital parameters like blood pressure and pulse rate. A blood pressure of 100/80 mmHg and a pulse rate of 120 bpm indicate mild hypotension and tachycardia, respectively. Stabilization of airway, breathing, and circulation (ABCs) is crucial in managing such patients.

**Why the Correct Answer is Right:**
The correct answer is **D.** Assessing the patient for hemorrhage is essential in blunt abdominal trauma management. A detailed physical examination, including abdominal examination, is necessary to look for signs of injury. Also, the patient's condition is stable regarding airway, breathing, and circulation (ABCs), allowing for a focused assessment.

**Why Each Wrong Option is Incorrect:**
A) Establishing the next step in management (A) is premature before a detailed assessment is completed.
B) Stabilizing the patient's breathing (B) and circulation (C) are important but not the next immediate step after ABCs are stabilized.

**Clinical Pearl / High-Yield Fact:**
In blunt abdominal trauma management, prioritize a focused assessment to identify potential hemorrhage, while ensuring ABCs are stable. This helps to guide further management and prevent unnecessary interventions, ensuring optimal patient care.