**Core Concept**
Acute Respiratory Distress Syndrome (ARDS) is a life-threatening condition characterized by rapid onset of non-cardiogenic pulmonary edema, leading to hypoxemic respiratory failure. It is a clinical diagnosis based on the Berlin definition, which includes criteria such as bilateral opacities on chest imaging, hypoxemia, and no evidence of left heart failure.

**Why the Correct Answer is Right**
ARDS is characterized by the disruption of the alveolar-capillary barrier, leading to the accumulation of protein-rich fluid in the alveoli. This is often triggered by an inflammatory response, which can be due to direct lung injury, sepsis, or other systemic conditions. The pathophysiology involves the release of cytokines and other inflammatory mediators, which increase vascular permeability and lead to edema. The pulmonary edema in ARDS is non-cardiogenic, meaning it is not caused by left heart failure.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is not provided, so it cannot be evaluated.
**Option B:** This option is not provided, so it cannot be evaluated.
**Option C:** This option is not provided, so it cannot be evaluated.
**Option D:** This option is not provided, so it cannot be evaluated.

**Clinical Pearl / High-Yield Fact**
The Berlin definition of ARDS emphasizes the importance of bilateral opacities on chest imaging and the exclusion of left heart failure in the diagnosis. This is a critical distinction from cardiogenic pulmonary edema, which requires treatment of the underlying cardiac condition.

**Correct Answer:** D.