In approximately _____ of the cases of mental retardation there is an identifiable cause related to biological or environmental factors; the most common of these is _____.
A)one-third; fetal alcohol syndrome
B)one-third; Down syndrome
C)one-quarter; fetal alcohol syndrome
D)one-quarter; Down syndrome

Question

Quizplus · Accepted Answer

In approximately one-third of the cases of mental retardation, there is an identifiable cause, and the most common of these is fetal alcohol syndrome. This condition results from alcohol exposure during the mother's pregnancy, causing brain damage and growth problems.

In Approximately _____ of the Cases of Mental Retardation There