**Core Concept**
Malignant hypertension is a severe and life-threatening condition characterized by extremely high blood pressure levels, often exceeding 180/120 mmHg. This condition is associated with end-organ damage, including renal failure, cardiac hypertrophy, and cerebral hemorrhage.

**Why the Correct Answer is Right**
Malignant hypertension is characterized by its rapid onset, severe symptoms, and potential for catastrophic consequences. The pathophysiology involves endothelial dysfunction, vascular remodeling, and renal sodium retention. The renin-angiotensin-aldosterone system (RAAS) is often activated, leading to increased peripheral resistance and cardiac workload.

**Why Each Wrong Option is Incorrect**
**Option A:** This option may be a characteristic of malignant hypertension, such as acute kidney injury, cardiac failure, or retinal hemorrhage.
**Option B:** This option may also be a feature of malignant hypertension, including left ventricular hypertrophy, pulmonary edema, or aortic dissection.
**Option C:** This option is incorrect because it is not a feature of malignant hypertension. Malignant hypertension typically involves systemic vascular resistance and end-organ damage, not a decrease in blood pressure.

**Clinical Pearl / High-Yield Fact**
It is essential to recognize the classic triad of malignant hypertension: severe headache, epistaxis, and visual disturbances. Early recognition and treatment can significantly improve outcomes.

**Correct Answer: C.**