A Client with Alzheimer's Disease Receives Tacrine (Cognex)

A client with Alzheimer's disease receives tacrine (Cognex) . Her son is commenting on his mother's condition. Which comment indicates an expected positive effect from this medication?

A) "My mother is less unstable on her feet."
B) "My mother is not deteriorating at this time."
C) "My mother seems to be cured of her Alzheimer's."
D) "My mother is no longer at risk of the effects of Alzheimer's."