The Best Avenue of Research for Effective Treatment of Alzheimer's

The best avenue of research for effective treatment of Alzheimer's disease involves

A) medications to remove placques, because they cause the symptoms in Alzheimer's disease.
B) prevention or treatment at the first sign of illness because lost neurons cannot be regained.
C) regenerating neurons in the brain to replace those lost or damaged by the disorder.
D) behavioral therapy to help improve memory and living skills.