Final answer:
The most informative question an Ambulatory Care nurse can ask a client is 'What brought you in today?' as it encourages the patient to describe their situation thoroughly, providing a comprehensive understanding of their health status.
Step-by-step explanation:
The question asked by the student focuses on which inquiry by an Ambulatory Care nurse would yield the most information from a client during assessment. The best option among the given choices is B: What brought you in today? This open-ended question encourages the client to provide a narrative explanation of their symptoms, concerns, and reasons for seeking medical attention, which is more informative than the yes-or-no response or specific factual information solicited by the other options.
Evaluating the clinical focus, an Ambulatory Care nurse would find such an open narrative helpful in understanding the condition of a patient like John, who is presenting with multiple symptoms. It gives insight into the patient's perspective and highlights the primary issues for which the patient is seeking care. This approach helps to establish a therapeutic nurse-client relationship and enables the nurse to gather comprehensive data for further assessment and care planning.