Which of the Following Children Is at the Greatest Risk

Which of the following children is at the greatest risk for intellectual disability?

A) Lincoln,who suffers from a chromosomal disorder,requires special education services,and lives in a very poor area of town.
B) Hector,who is slightly malnourished and lives in a home where his mother is often physically abused by his father.
C) Glenda,who lives in an upper-class suburb with her parents with whom she has a very odd relationship.
D) Maureen,who was in a car accident as a child which resulted in traumatic brain damage.