A 43-year-old Caucasian woman is brought to the clinic by her husband. Her illness began several years earlier with increased nervousness, irritability, and depression and had progressed to include a...

A 43-year-old Caucasian woman is brought to the clinic by her husband. Her illness began several years earlier with increased nervousness, irritability, and depression and had progressed to include a jerky gait with strange dance-like movements of her upper and lower extremities. Her family history was significant for a mother with similar symptoms and psychosis who died at 45 shortly after being committed to an asylum. What is her diagnosis?

A. Parkinsonism

B. Parkinson disease

C. CJD

D. Huntington disease