Which of the Following Statements About Immunization Is True

Which of the following statements about immunization is true?

A) Infant immunization has been identified as a leading risk factor for autism and other developmental disorders.
B) The immune systems of young children cannot safely handle multiple vaccines.
C) Immunization rates are lower among minority groups and poor families.
D) Immunization has done little to combat childhood illness,including measles and pertussis.