A. Losartan is an angiotensin receptor blocker (ARB) that serves as an effective alternative to ACE inhibitors, particularly for patients who experience cough as a side effect. B. Metoprolol is a beta-blocker, which is not a direct alternative to ACE inhibitors and is used for different indications such as heart rate and blood pressure control. C. Furosemide is a diuretic that does not directly substitute for the actions of ACE inhibitors. D. Hydralazine is a direct vasodilator used for hypertension but does not share the same mechanism as ACE inhibitors or serve as a direct alternative.