A 70-yeаr-оld wоmаn with Type II diаbetes mellitus treated with Glimepiride (Amaryl) presents accоmpanied by her daughter, who provides the patient’s history. The patient has a two-week history of cough, fever, and excessive diuresis. Her oral intake of food and fluid has been poor during this time period as well. On physical examination, the patient is febrile with T: 100.6˚F. BP: 98/58 HR: 112/min RR: 20/min, shallow. The patient is stuporous; skin and mucous membranes are dry. Heart: regular rate and rhythm without murmurs; Lungs: auscultation reveals rales in the right lung base. Blood glucose level is 720 mg/dL. Serum ketones: absent. Based on this information, which of the following conditions is the most likely diagnosis for this patient?