Sarah, a 55-year-old woman, visits her primary care clinic for a routine check-up. She has a past medical history of hypertension. During the visit, her blood pressure is measured, and the nurse notes it as 200/79 mmHg. Sarah reports occasional headaches but denies any chest pain, shortness of breath, or dizziness. She mentions that she has been under stress lately due to work and family responsibilities. Based on her blood pressure readings and symptoms, the nurse suspects that Sarah's hypertension may be progressing. Which stage of hypertension is Sarah likely experiencing based on her blood pressure reading and symptoms, and what is the most important action for the nurse to take?

A. Hypertensive crisis; Notify the healthcare provider immediately and prepare to transfer the patient to the emergency department (ED).: BP ≥180 systolic is hypertensive crisis, even if only mild symptoms are present. Requires urgent evaluation. B. Stage 3 hypertension; Educate Sarah on lifestyle modifications and schedule a follow-up appointment.: “Stage 3” is not an actual category; delaying urgent care is unsafe at this pressure. C. Stage 2 hypertension; Administer antihypertensive medication and refer Sarah to a hypertension specialist.: Stage 2 (≥140/90) fits, but 200 systolic qualifies as hypertensive crisis, requiring immediate attention, not just referral. D. Stage 1 hypertension: Initiate lifestyle modifications and monitor blood pressure closely.: Stage 1 is 130–139/80–89, much lower than Sarah’s reading.