The nurse is caring for a client newly diagnosed with hypertension and requires medication therapy. Which of the following medications below is considered a first line treatment for hypertension?

A. Doxazosin is an alpha-1 blocker that can be used for hypertension but is not a first-line option. B. Carvedilol is a beta-blocker used in heart failure and post-MI but is not the first choice for initial hypertension treatment. C. Lisinopril, an ACE inhibitor, is widely recognized as a first-line treatment for hypertension due to its effectiveness and favorable side effect profile. D. Clonidine is generally not considered a first-line treatment for hypertension due to potential side effects and the availability of more effective alternatives.