Step-by-step explanation:
b. Measure blood pressure with the client sitting.
The nurse should first measure the blood pressure with the client sitting. This is because the client's blood pressure is currently low (88/60 mm Hg), which may be a potential side effect of captopril, an angiotensin-converting enzyme (ACE) inhibitor used to treat hypertension. By measuring the blood pressure in a sitting position, the nurse can assess if the client's blood pressure is stable and determine the need for further interventions. Placing the client in a supine position or checking the blood pressure with the client standing may not be appropriate at this time, as the client's blood pressure is already low. Administering a 0.9% sodium chloride IV bolus may be considered if the client's blood pressure remains low and they are symptomatic, but it is not the first action to take in this situation.