The most common cause of mental retardation is ________.
A) Down syndrome
B) autism
C) the environment is not stimulating
D) a fragile X syndrome

Question

Quizplus · Accepted Answer

According to the American Association on Intellectual and Developmental Disabilities (AAIDD), Down syndrome is the most common genetic cause of intellectual disability, accounting for approximately 5-6% of all cases.

The Most Common Cause of Mental Retardation Is ________