You are answering a USMLE-style medical question. Question: A 52-year-old man with Crohn disease comes to the physician because of a 1-week history of dysuria and urinary urgency. He had been treated for urinary tract infections twice in the past 6 months. He is currently taking infliximab. Cystoscopy shows pearl-like plaques on the bladder wall. Biopsy of these lesions shows a focal layer of stratified squamous epithelium with hyperkeratosis. If the patient's bladder finding is caused by a vitamin deficiency, which of the following features is also most likely to be seen? Options: A) Carpopedal spasm B) Photodermatitis C) Night blindness D) Intracranial hypertension Reply with ONLY the letter of the correct answer (A, B, C, or D). No explanation.