Which of the Following Statements Regarding Down Syndrome Is False

Multiple Choice

Which of the following statements regarding Down syndrome is false?

A) People with Down syndrome usually have a shorter life span than normal.
B) Trisomy 21 is the cause of Down syndrome.
C) Down syndrome is least likely to be seen in the infants of mothers over 40.
D) Down syndrome is the most common serious birth defect in the United States.