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.

A．not remember childhood events
B．suffer a gradual worsening of cognitive functions
C．incur personality and behavioral changes
D．spend their last days in a long-term care institution