A type 1 diabetic patient who was admitted with severe hypoglycemia and treated tells the nurse, "I did not have any of the usual symptoms of hypoglycemia." Which question by the nurse will help identify a possible reason for the patient's hypoglycemic unawareness?
a. "Do you use any calcium-channel blocking drugs for blood pressure?"
b. "Have you observed any recent skin changes?"
c. "Do you notice any bloating feeling after eating?"
d. "Have you noticed any painful new ulcerations or sores on your feet?"