Derek, an Alcoholic, Was Just Diagnosed with Korsakoff's Syndrome

Derek, an alcoholic, was just diagnosed with Korsakoff's syndrome. A possible cause and a symptom of this syndrome is ____.

A) GABA receptor loss and high blood pressure
B) GABA receptor loss and memory loss
C) vitamin B₆ deficiency and high blood pressure
D) vitamin B₁ deficiency and memory loss