**Core Concept**
Kimmelstiel-Wilson lesions are characteristic histopathological changes seen in the kidneys of diabetic patients, particularly those with long-standing type 1 diabetes mellitus. These lesions are a classic feature of diabetic nephropathy, a leading cause of chronic kidney disease and end-stage renal disease.

**Why the Correct Answer is Right**
Kimmelstiel-Wilson lesions are characterized by the formation of nodular glomerulosclerosis, which involves the accumulation of mesangial matrix material and the formation of nodules within the glomeruli. This process is thought to result from the activation of the renin-angiotensin-aldosterone system and the increased expression of transforming growth factor-beta (TGF-β), which promotes the deposition of extracellular matrix proteins. The nodules are composed of mesangial cells and matrix, as well as endothelial and epithelial cells. The accumulation of these cells and matrix leads to the obliteration of the glomerular capillaries and the loss of renal function.

**Why Each Wrong Option is Incorrect**
* **Option A:** Incorrect because Kimmelstiel-Wilson lesions are not associated with the formation of crescents, which are characteristic of rapidly progressive glomerulonephritis.
* **Option B:** Incorrect because Kimmelstiel-Wilson lesions are not primarily composed of fibrinoid material, which is characteristic of vasculitis and other forms of glomerulonephritis.
* **Option C:** Incorrect because Kimmelstiel-Wilson lesions are not associated with the formation of amyloid deposits, which are characteristic of amyloidosis.

**Clinical Pearl / High-Yield Fact**
Kimmelstiel-Wilson lesions are a classic example of a "double pathology," where a single disease process (diabetes) leads to the formation of two distinct pathological features (nodular glomerulosclerosis and microvascular disease).

**Correct Answer:** C. Nodular glomerulosclerosis.