question: Q:A 52-year-old woman is accompanied by her husband to the emergency department with a severe occipital headache that started suddenly an hour ago. She is drowsy but able to answer the physician’s questions. She describes it as the worst headache she has ever had, 9/10 in intensity. The husband says it was initially localized to the occiput but has now spread all over her head and she also complained of a generalized heaviness. She took an ibuprofen without experiencing any relief. She also complains of blurry vision and nausea and had 1 episode of vomiting. She denies a recent history of fever, chills, numbness, or seizures. Her past medical history is significant for hypertension controlled with lisinopril and metoprolol. On examination, she is drowsy but oriented. Papilledema is seen on ophthalmoscopy. Neck flexion is difficult and painful. The rest of the exam is unremarkable. Her blood pressure is 160/100 mm Hg, heart rate is 100/min, and temperature is 37.0°C (98.6°F). The ECG, cardiac enzymes, and laboratory studies are normal. Lumbar puncture results are as follows:
  Opening pressure 210 mm H2O
  RBC 50/mm3, numbers steady over 4 test tubes
  Cell count 5/mm3
  Glucose 40 mg/dL
  Proteins 100 mg/dL
  The patient is admitted to the ICU for further management. Which of the following is the most likely pathophysiology based on her history and CSF findings?? 
  {'A': 'Viral infection of the brain parenchyma', 'B': 'Intracerebral bleed', 'C': 'Bacterial infection of the meninges', 'D': 'Trauma during lumbar puncture', 'E': 'Rupture of the communicating branches of the cerebral arteries'},