**Core Concept:**

A. Hemodynamically stable patient with a FAST positive (Focused Assessment with Sonography in Trauma) result indicates a potential solid organ injury, specifically a ruptured spleen. A contrast-enhanced CT scan (CECT) is useful for assessing the extent of injury and guiding management.

**Why the Correct Answer is Right:**

The correct answer (D) is based on the clinical scenario provided, which mentions a patient with left sided abdominal pain, FAST positive result, and a CECT scan showing a contrast blush (indicating active bleeding) and a grade III laceration (severe injury). In this situation, splenic injury is the most probable cause of the patient's symptoms and findings. The patient is hemodynamically stable, suggesting that the injury is not severe enough to cause hypotension and shock immediately.

**Why Each Wrong Option is Incorrect:**

A. Hemodynamically stable patients with a FAST positive result and grade III laceration on CECT are typically managed operatively due to the severity of the injury and potential for ongoing bleeding. This option is incorrect because it does not address the specific injury described in the scenario.

B. A FAST positive result and grade III laceration on CECT indicate a severe injury, but this option suggests conservative management without discussing the specific injury (splenic rupture). This answer is incorrect due to the mentioned clinical findings.

C. Conservative management is not suitable for a patient with a FAST positive result and grade III laceration, as these findings indicate a severe injury. This answer is incorrect as it does not address the specific injury described in the scenario.

D. This option discusses the appropriate management for a patient with a FAST positive result, grade III laceration, and splenic injury (grade III laceration indicates severe injury). Operative management is suggested due to the severity of the injury and the potential for ongoing bleeding.

E. This answer is incorrect as it does not address the specific injury described in the scenario (grade III splenic laceration).

**Clinical Pearl:**

In hemodynamically stable patients with severe abdominal injuries, particularly grade III splenic laceration, operative management is often required to prevent potential complications such as ongoing bleeding, intraperitoneal contamination, and the risk of splenic rupture. Conservative management is not suitable for patients with these findings.

**Correct Answer:** D

**Explanation:**

The correct answer (D) suggests operative management for a patient with a FAST positive result, grade III splenic laceration, and splenic injury. Operative management is recommended due to the severity of the injury (grade III splenic laceration) and the potential risks associated with it, such as ongoing bleeding and the risk of splenic rupture. Conservative management is not suitable for patients with these findings.