Which Statement About the Development of Alzheimer's Is True?
A) $\beta$

Which statement about the development of Alzheimer's is true?

A) People with one or two copies of the NGF gene are less likely to exhibit Alzheimer's.
B) A greater risk of developing Alzheimer's is associated with having one or more copies of the ApoE4 version of the gene for apolipoprotein
C) People with functional genes for presenilin are less likely to develop $\beta$ -amyloid plaques.
D) A greater risk of developing Alzheimer's is associated with having two or more copies of the ApoE version of the gene for apolipoprotein