Final answer:
To determine if the weight loss was intentional or unintentional, the nurse might ask if the patient has been following a specific diet.
Step-by-step explanation:
To determine if the weight loss was intentional or unintentional, the nurse might ask the question, 'Have you been following a specific diet?' This question helps determine if the weight loss was a result of intentional efforts to lose weight through a specific dietary plan or if it occurred without intentional efforts.