The nurse is assessing a child admitted with a diagnosis of rheumatic fever. Which significant question would the nurse ask the child's parent during the assessment?

The correct answer is B: "Has any family member had a sore throat within the past few weeks?" This question is relevant because rheumatic fever is often preceded by a streptococcal infection, which presents as a sore throat. By asking about recent sore throats in family members, the nurse can gather important information about possible exposure to streptococcal bacteria. Choices A, C, and D are incorrect because they do not directly relate to the potential cause of rheumatic fever. Asking about exposure to chickenpox (Choice A) is not relevant to rheumatic fever. Similarly, questions about gastrointestinal disorders (Choice C) and difficulty urinating (Choice D) are not typically associated with rheumatic fever.