You are answering a USMLE-style medical question. Question: A 25-year-old female with Hodgkin's lymphoma presents with a several day history of edema. Lab studies show: Serum Na+: 140 mmol/L Serum K+: 3.5 mmol/L Serum albumin: 1.9 g/dL Total serum bilirubin: 1.0 mg/dL Serum creatinine: 1.2 mg/dL Urinalysis shows 4+ proteinuria and fatty casts. What is the most likely diagnosis? Options: A) Focal segmental glomerulosclerosis B) Membranous nephropathy C) Minimal change disease D) Amyloidosis Reply with ONLY the letter of the correct answer (A, B, C, or D). No explanation.