Which of the Following Statements Is TRUE with Regard to the Rate

Which of the following statements is TRUE with regard to the rate of Alzheimer's type dementia for different demographic groups?

A) Males and certain racial groups appear to have lower rates of the disorder.
B) No differences are found in the rate of Alzheimer's type dementia by gender, but some racial differences have been noted.
C) No differences are found in the rate of Alzheimer's type dementia by race, but women appear to have a higher rate of the disorder than men.
D) No differences in the rate of the disorder by race or gender have been noted.