A patient's current medications are listed below. Read the following drug list and answer the questions 1 - 4: Albuterol Lisinopril Metformin Warfarin Spiriva Lasix Which of the following pairs of medications may be used to treat diabetes? OA. Lisinopril and Albuterol OB. Metformin and Humulin OC. Trazadone and Alprazolam OD. Warfarin and Amoxicillin