Which One of the Following Statements Most Accurately Reflects the Concept

Which one of the following statements most accurately reflects the concept of distributed intelligence?

A) How intelligent children become is, to some extent, a function of the number of siblings they have; children from larger families tend to have slightly lower IQ scores.
B) How intelligent students are is, to some extent, a function of class size; students achieve at lower levels when they are in larger classes.
C) Students almost invariably perform at higher levels in some academic subject areas than they do in others.
D) Students can behave more intelligently when they can use outside resources as well as their minds.