**Core Concept**
Aschoff bodies are granulomatous lesions composed of an aggregation of inflammatory cells, including macrophages, lymphocytes, and plasma cells, which are characteristic of rheumatic heart disease. They are formed in response to autoimmune reactions against the heart tissue.

**Why the Correct Answer is Right**
Aschoff bodies are a classic histopathological finding in rheumatic heart disease, which is an autoimmune response to group A beta-hemolytic streptococcal infections. The formation of Aschoff bodies is a result of the activation of the immune system, leading to the infiltration of inflammatory cells into the heart tissue. The Aschoff bodies are composed of a central area of fibrinoid necrosis surrounded by an outer layer of macrophages, lymphocytes, and plasma cells. The presence of Aschoff bodies is a hallmark of rheumatic heart disease and is often used as a diagnostic criterion.

**Why Each Wrong Option is Incorrect**
**Option A:** Aschoff bodies are not typically seen in viral myocarditis, which is characterized by a different type of inflammatory response.
**Option B:** Aschoff bodies are not a feature of Kawasaki disease, which is a distinct clinical entity with its own set of histopathological findings.
**Option C:** Aschoff bodies are not a characteristic finding in sarcoidosis, which is a systemic granulomatous disease with a different set of clinical and histopathological features.

**Clinical Pearl / High-Yield Fact**
Aschoff bodies are a classic example of a granulomatous reaction, which is a hallmark of autoimmune and inflammatory diseases. Other examples of granulomatous reactions include the presence of giant cells in tuberculosis and the formation of granulomas in sarcoidosis.

**Correct Answer:** C. Rheumatic heart disease.