A 49-Year-Old Woman Was Found on Ophthalmoscopic Examination to Have

A 49-year-old woman was found on ophthalmoscopic examination to have edema of both optic discs (bilateral papilledema) and congestion of both retinal veins. The cause of the condition was found to be a rapidly expanding intracranial tumor.
-The following statements concerning this patient are correct except which?

A) An intracranial tumor causes a rise in cerebrospinal fluid pressure.
B) The optic nerves are surrounded by sheaths derived from the pia mater, arachnoid mater, and dura mater.
C) The intracranial subarachnoid space extends forward around the optic nerve for about half its length.
D) The thin walls of the retinal vein will be compressed as the vein crosses the extension of the subarachnoid space around the optic nerve.
E) Because both subarachnoid extensions are continuous with the intracranial subarachnoid space, both eyes will exhibit papilledema and congestion of the retinal veins.