Sherman and Key Studied the Intellectual Abilities of Children Living

Sherman and Key studied the intellectual abilities of children living in isolated villages and noted that they had inferior intellects when compared with children living in more populated areas. What conclusion did they draw from this?

A) Children develop intelligence in response to environmental demand.
B) Children in isolated social groups do not develop as much intelligence as those in larger social groups.
C) Children develop intelligence based on factors unrelated to location.
D) Children of lower socioeconomic status are less intelligent.