Final answer:
The answer indicating a risk factor for acute poststreptococcal glomerulonephritis is "He just got over a head cold with laryngitis," as it implies a recent infection which can precede this kidney condition.
Step-by-step explanation:
The correct response that provides evidence of a risk factor for acute poststreptococcal glomerulonephritis is: B) "He just got over a head cold with laryngitis." This statement suggests a recent upper respiratory infection, which is a known precursor to acute glomerulonephritis. This condition often develops within 6-10 days following a throat infection like strep throat, and up to 21 days after a skin infection. Acute glomerulonephritis is a result of an immune response to streptococcal antigens, where the formation of immune complexes and their subsequent deposition in the glomeruli lead to kidney damage.