Final answer:
The question that is most likely to elicit information about the cause of glomerulonephritis is asking if the child recently complained of a sore throat.
Step-by-step explanation:
The question that is most likely to elicit information about the cause of glomerulonephritis is: 3. "Did your child recently complain of a sore throat?"
Glomerulonephritis is often caused by a post-streptococcal infection, which can result from a streptococcal throat infection. By asking if the child recently complained of a sore throat, the nurse can gather information that may help determine if the cause of the glomerulonephritis is related to a streptococcal infection.