Mark Was Diagnosed with a Moderate Intellectual Disability and Would

Multiple Choice

Mark was diagnosed with a moderate intellectual disability and would be described as a loving and responsive child,who is making progress in a specially tailored educational program. Mark's condition is the result of his receiving an extra chromosome from his mother,who was 48 years old when he was born.Mark has

A) cretinism.
B) phenylketonuria (PKU) .
C) Down syndrome.
D) fragile-X syndrome.