question: Q:An 89-year-old woman is admitted to the neurology intensive care unit following a massive cerebral infarction. She has a history of hypertension, ovarian cancer, and lung cancer. Her medications include lisinopril and aspirin. She has smoked a few cigarettes each day for the last 60 years. She does not drink alcohol or use drugs. An arterial line and intraventricular pressure monitor are placed. You decide to acutely lower intracranial pressure by causing cerebral vasoconstriction. Which of the following methods could be used for this effect?? 
  {'A': 'Mannitol infusion', 'B': 'Glucocorticoids', 'C': 'Mechanical hyperventilation', 'D': 'Mechanical hypoventilation', 'E': 'Elevating head position'},