In Administering a Calcium Channel Blocker to Patient Diagnosed with Primary

In administering a calcium channel blocker to patient diagnosed with primary hypertension, the nurse correlates a decrease to which mechanism of action of this medication?

A) Blocks formation of angiotensin II, a potent vasoconstrictor
B) Blocks the action, not the formation, of angiotensin II
C) Decreases blood vessels' ability to contract and cause vasoconstriction
D) Relaxes the muscles of the blood vessels