Down Syndrome Is a Genetic Disorder That Illustrates How the Expression

Down syndrome is a genetic disorder that illustrates how the expression of an individual's genetic code can be influenced by environmental conditions.What have researchers found regarding the treatment of Down syndrome?

A) Early mortality from Down syndrome can be reduced if children with the disorder are placed on a special diet right from birth.
B) The physical characteristics typically associated with the disorder can be reduced through early intervention.
C) The disorder can be successfully treated during the prenatal period with genetic engineering technology.
D) The cognitive impairment typically associated with the disorder can be reduced through early intervention.