Dalton Has Been Diagnosed with Korsakoff's Syndrome

Multiple Choice

 Dalton has been diagnosed with Korsakoff's syndrome. What likely caused his disorder?

A) He is an alcoholic and has damaged his nervous system such that glucose cannot cross the blood-brain barrier.
B) He has been exposed to a virus that has now started killing neurons.
C) He doesn't have enough thiamine probably as a result of chronic alcoholism.
D) His glial cells are overactive and are damaging healthy neurons.