The Nurse Preparing to Administer Both a Calcium Channel Blocker

The nurse preparing to administer both a calcium channel blocker and a beta₁ adrenergic blocker to a client with hypertension plans to monitor the client's response based on an understanding that these drugs:

A) Promote calcium influx into vascular smooth muscle.
B) Prevent calcium influx into vascular smooth muscle.
C) Promote urinary excretion of sodium.
D) Block sympathetic impulses in sarcolemma membranes.