单项选择题
A 7-year-old boy is recovering from impetigo. Physical examination shows a few honey-colored crusts on his face. The crusts are removed, and a culture of the lesions grows group A Streptococcus pyogenes. He is treated with a course of antibiotics. One week later, he develops malaise with nausea and a slight fever and passes dark brown urine. Laboratory studies show a serum anti-streptolysin O (ASO) titer of l:1024. Which of the following is the most likely outcome?
A．Development of rheumatic heart disease
B．Chronic renal failure
C．Lower urinary tract infection
D．Complete recovery without treatment
E．Progression to crescentic glomerulonephritis
