A 6-year-old boy is brought to the physician for a 2-day history of puffiness beneath his eyes and fullness at his ankles. He has no past medical history. His vitals are normal. Physical examination shows periorbital and pedal edema. There is no abdominal fluid wave. Urinalysis shows 3+ protein and 0-2 RBCs/hpf. Which of the following conditions is most likely to produce similar urinalysis findings?
A) Diabetic glomerulosclerosis
B) Diffuse proliferative glomerulonephritis
C) IgA nephropathy
D) Membranoproliferative glomerulonephritis
E) Proliferative glomerulonephritis
