challenge: What was the title of Carl Behr's 1936 neuro-ophthalmological publication?
  
  A. The Ophthalmological Diagnosis of Tabes Dorsalis
  B. Der Augenbefund in seiner diagnostischen und differentialdiagnostischen Bedeutung bei Tabes dorsalis, Lues cerebrospinalis, Multipler Sklerose
  C. Eye Disorders in Multiple Sclerosis
  D. The Neurological Impact of Lues Cerebrospinalis on Vision
  Answer: 