Which statement below about the prevalence of childhood sexual ...

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Which statement below about the prevalence of childhood sexual abuse is accurate?
 
  a. The prevalence of sexual abuse is probably lower than is commonly thought.
  b. Estimated prevalence rates range from 25 percent to 75 percent.
  c. Because of increased media attention, the prevalence has dropped dramatically in recent years.
  d. Because definitions vary widely, estimates of prevalence vary widely, too.

Question 2

It has been observed that if a woman gives birth to a child with Down syndrome before the age of 35, she has an increased risk of developing Alzheimer's disease. Which of the following best explains this observation?
 
  a. The same gene underlies both Down syndrome and Alzheimer's disease.
  b. Women under 35 are not emotionally mature enough to manage a child with mental retardation.
  c. Multiple copies of the APOE-4 allele increase the likelihood of both conditions.
  d. A genetic mutation that increases susceptibility to Alzheimer's disease also increases the likelihood of passing on chromosomal abnormalities.

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Answer to Question 1

d. Because definitions vary widely, estimates of prevalence vary widely, too.

Answer to Question 2

d. A genetic mutation that increases susceptibility to Alzheimer's disease also increases the likelihood of passing on chromosomal abnormalities.