Research on Genetics and Intelligence Test Scores Has Shown That

Multiple Choice

Research on genetics and intelligence test scores has shown that

A) genetic factors can help partially explain between-group variation but not within-group variation.
B) genetic factors can help partially explain within-group variation but not between-group variation.
C) genetic factors can help partially explain between-group variation and within-group variation.
D) genetic factors cannot help partially explain neither between-group variation or within-group variation.