An Older Adult Patient Is to Receive Atenolol,a Beta-Adrenergic Blocking

An older adult patient is to receive atenolol,a beta-adrenergic blocking agent.Prior to administration of the drug,the nurse assesses an apical pulse rate of 58 and notes ankle edema.Which action will the nurse take first?

A) Determine the therapeutic blood level.
B) Encourage the patient to decrease water intake.
C) Elevate the patient's legs.
D) Withhold the medication.