**Core Concept**
Abdominal hypertension is a life-threatening condition characterized by elevated intra-abdominal pressure (IAP) that can lead to organ dysfunction. Grade II abdominal hypertension is defined as an IAP of 15-20 mmHg, which requires prompt treatment to prevent further complications.

**Why the Correct Answer is Right**
The goal of treating Grade II abdominal hypertension is to reduce IAP, alleviate organ compression, and restore blood flow to vital organs. **Norepinephrine** is a vasopressor that can help increase mean arterial pressure and improve perfusion of abdominal organs. Additionally, **fluid resuscitation** is essential to maintain adequate blood volume and prevent further increases in IAP.

**Why Each Wrong Option is Incorrect**
**Option A:** **Sodium nitroprusside** is a vasodilator that can further decrease blood pressure and worsen abdominal perfusion, making it an inappropriate choice for treating Grade II abdominal hypertension.
**Option B:** **Mannitol** is an osmotic diuretic that can increase urine output but may also exacerbate hypovolemia and worsen abdominal hypertension.
**Option C:** **Laparotomy** is a surgical intervention typically reserved for Grade III or IV abdominal hypertension, where IAP is extremely high and organ dysfunction is imminent.

**Clinical Pearl / High-Yield Fact**
When managing abdominal hypertension, it's essential to remember the ** abdominal perfusion pressure (APP) = mean arterial pressure (MAP) - IAP**. Maintaining an adequate APP is crucial to prevent organ dysfunction.

**Correct Answer: A. Norepinephrine and fluid resuscitation**