Match each antihypertensive drug w ith its appropriate m echanism of action (each lettered option can be selected once, m ore than once, or not at all). A. Aliskiren B. Clonidine C. Diazoxide D. Enalapril E. Fenoldopam F. Furosem ide G. Hydralazine H. Hydrochlorothiazide I. Labetalol J. Losartan K. Methyldopa L. Nifedipine M. Nitroprusside N. Prazosin O. Propranolol P. Spironolactone Q. Verapam il 1. Nitric oxide is the active m etabolite. 2. Activation of dopam ine D1 receptors 3. Blockade of angiotensin AT1 receptors 4. Potassium channel opening in sm ooth m uscle cells 5. Com petitive inhibition of rennin