When assessing a patient's edema, which of the following questions can be asked to quantify the degree of edema?

A. What salty foods do you eat?: Dietary sodium intake contributes to fluid retention, but this question assesses a potential cause rather than quantifying the extent of edema. It does not provide a measurable or comparative indicator of swelling severity. B. How much water are you drinking per day?: Fluid intake influences volume status, but reported intake does not reflect where fluid is accumulating or the degree of peripheral edema. This question evaluates risk factors, not physical changes. C. Have you bought slimmer pants recently?: Clothing fit can be influenced by weight changes, body composition, or fashion choices and is not specific to edema. It lacks precision and does not reliably reflect localized fluid accumulation. D. Are your rings fitting tighter lately?: Changes in ring fit indicate swelling in the hands and fingers and allow comparison over time. This question helps quantify edema progression using a consistent personal baseline and is commonly used in clinical assessment.