In Approximately _____ of the Cases of Mental Retardation There

question 8

Multiple Choice

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