**Core Concept**
HIV-associated nephropathy (HIVAN) is a type of kidney disease that occurs in individuals infected with the human immunodeficiency virus (HIV). It is characterized by the direct infection of renal cells by HIV, leading to inflammation, scarring, and progressive kidney damage.

**Why the Correct Answer is Right**
HIVAN is caused by the direct infection of renal cells by HIV, which leads to the production of viral particles and the activation of inflammatory pathways. The virus targets the podocytes, a type of cell in the glomerulus, leading to their damage and subsequent loss of kidney function. The pathogenesis of HIVAN involves the interaction between HIV and the host's immune system, leading to the activation of various inflammatory cytokines and chemokines.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because HIVAN is not primarily caused by an immune complex-mediated glomerulonephritis.
**Option B:** This option is incorrect because while HIVAN can lead to hypertension, it is not the primary cause of hypertension in these patients.
**Option C:** This option is incorrect because while HIVAN can lead to renal failure, it is not the only cause of renal failure in HIV-infected individuals.

**Clinical Pearl / High-Yield Fact**
HIVAN is a common cause of kidney disease in HIV-infected individuals, particularly those of African descent. Early diagnosis and treatment of HIVAN are crucial to prevent progressive kidney damage and renal failure.

**Correct Answer: D. HIV-associated nephropathy (HIVAN)**