A 25-year-old woman with severe obesity presented to the emergency department with a 1-week history of blurred vision, headaches, and transient visual obscurations. Neurologic examination showed optic disk swelling and retinal hemorrhages in both eyes. An MRI and MRV of the head showed flattened posterior globes, an empty sella, and stenoses of the transverse sinuses without obstruction or thromboses. Which abnormality would most likely be notable from a lumbar puncture? Options A.Elevated opening pressure B.Elevated white blood cell count C.Oligoclonal bands D.Positive anti-aquaporin 4 antibody E.Xanthochromia