Which of the Following Statements About Children and Environmental Hazards

Which of the following statements about children and environmental hazards is correct?

A) The prevalence of autism is directly related to the increase in environmental toxins.
B) Children are more susceptible to environmental toxins because of their smaller size.
C) The prevalence of asthma among children has been decreasing.
D) Children are more susceptible to cancer if they have a family history of the disease.