The nurse is caring for a client with a history of type 2 diabetes mellitus (DM) and hypertension who arrived at the clinic for a scheduled visit. Which finding should the nurse recognize as a possible complication?

A Fasting serum glucose 140 mg/dL (7.77 mmol/L). C Serum creatinine 1.6 mg/dL (141.44 umol/L). B Glycosylated hemoglobin (A1c) 6.9%. D White blood cell (WBC) 11,000/mm3 (11 x 10^9/L).