Final answer:
The nurse would assess for other signs of preeclampsia.
Step-by-step explanation:
In this scenario, the nurse would assess for other signs of preeclampsia. Preeclampsia is a hypertensive disorder that can occur during pregnancy and is characterized by high blood pressure, proteinuria (protein in the urine), and sometimes edema. While the blood pressure measurement of 142/90 is elevated, it is not enough evidence to immediately initiate antihypertensive medication. Instead, the nurse should further assess the client for other signs and symptoms of preeclampsia to determine the appropriate course of action.