**Core Concept**
Buerger's Disease, also known as Thromboangiitis Obliterans, is a rare, non-atherosclerotic, segmental inflammatory disease of the small and medium-sized arteries and veins, leading to thrombosis and eventual obliteration of these vessels.

**Why the Correct Answer is Right**
The disease predominantly affects the lower extremities, with a strong association with smoking. The exact pathogenesis is unknown, but it is believed to result from an abnormal immune response to nicotine, leading to inflammation and subsequent vascular damage. The disease is characterized by thrombosis, inflammation, and eventually, fibrosis of the affected vessels.

**Why Each Wrong Option is Incorrect**
**Option A:** This option may be incorrect as it doesn't describe the primary characteristic of Buerger's Disease. Buerger's Disease is primarily an inflammatory process affecting the small and medium-sized arteries and veins, rather than a purely thrombotic condition.
**Option B:** This option may be incorrect as it doesn't acknowledge the non-atherosclerotic nature of the disease. Buerger's Disease is distinct from atherosclerosis, which is a primary cause of peripheral artery disease.
**Option C:** This option may be incorrect as it doesn't accurately describe the predominant involvement of the lower extremities. While Buerger's Disease can affect other areas, it most commonly affects the lower extremities.

**Clinical Pearl / High-Yield Fact**
Buerger's Disease has a strong association with smoking, and smoking cessation is essential for managing the disease. Patients with Buerger's Disease often require aggressive smoking cessation programs to prevent disease progression.

**Correct Answer:** Thromboangiitis Obliterans