A 53-year-old man presents for a follow-up visit. He has a 12-year history of type 2 diabetes mellitus that is currently be treated with a maximally-tolerated dose of metformin and a thiazolidinedione. He also has hypertension that is well controlled with a calcium channel blocker. His A1C today is 8.2% and it is decided that step-up therapy is needed. His BMI is 34 kg/m2 and he expresses interest in losing weight. The most appropriate treatment option is: QID: 3660206Mark For Review Increase his dose of the thiazolidinedione. Add a sulfonylurea. Add a DPP-4 inhibitor. Add a GLP-1 agonist.