You are answering a USMLE-style medical question. Question: A 31-year-old female patient complains of numbness and tingling in her left hand, weakness, difficulty with walking, dizziness, and bladder dysfunction. She said that about a year ago, she had trouble with her vision, and that it eventually recovered in a few days. On physical exam, bilateral internuclear ophthalmoplegia, hyperreflexia in both patella, and bilateral clonus, are noted. A magnetic resonance imaging (MRI) study was done (Figure 1). If a lumbar puncture is performed in this patient, which of the following would most likely be found in cerebrospinal fluid analysis? Options: A) Presence of 14-3-3 protein B) Decreased glucose with neutrophilic predominance C) Oligoclonal IgG bands on electrophoresis D) Decreased IgG CSF concentration Reply with ONLY the letter of the correct answer (A, B, C, or D). No explanation.