3. True statements about optic neuritis include which of the following?

A) It is an uncommon initial manifestation of multiple sclerosis.
B) When blood-brain barrier breakdown is present it decreases the signal on postcontrast short T1-inversion recovery (STIR) images.
C) In acute stages it enhances, but does not result in enlargement of the optic nerve.
D) Unlike meningioma it does not produce "tram track" enhancement.
E) The risk of eventually developing multiple sclerosis is equally high regardless of visualization of concomitant brain lesions on MRI.