【单选题】The symptoms of Alzheimer's disease were long dismissed as normal con sequences of human aging, but in the 1980's the disease came to be recognized as the most common cause of intellectual deteriorati...
A.
In the past, Alzheimer's disease has often been mistaken as normal human aging
B.
Victims of Alzheimer's disease rarely need to be institutionalized.
C.
There is currently no cure for Alzheimer's disease.
D.
The primary symptoms are serious forgetfulness and confusion.