In 30 to 40 Percent of the Cases of Intellectual

Multiple Choice

In 30 to 40 percent of the cases of intellectual disabilities,no known biological problem can be identified with the degree of disability being mild and usually other close relatives also being mildly disabled.This type of intellectual disability is referred to as a(n) __________ intellectual disability.

A) organic
B) metabolic
C) familial
D) functional