An eight-year-old boy presents with headaches, dizziness, and malaise approximately two weeks after a severe sore throat. His mother describes puffiness of his face and darkening of his urine. She also notes that her son is passing less urine and that he is becoming increasingly short of breath. On physical examination, there is anasarca, hypertension (190/130), and tachycardia. The urine is scanty and brownish red. Urinalysis shows 3+ proteinuria. Microscopic examination of the year and discloses numerous RBCs, as well as occasional granular and red cell casts. A renal biopsy is stained by direct immunofluorescence microscopy for complement C3, and the results are shown. Which of the following best describes the pattern of immunofluorescence observed in this renal biopsy?
A. Deposits limited to the mesangium
B. Subepithelial and subendothelial deposits
C. Dense deposits in glomerular crescents between epithelial cells
D. Linear staining along the glomerular basement membranes
E. Granular deposits along the perimesangial reflections