Which Statement About Group Differences in Intelligence Test Scores Is

Which statement about group differences in intelligence test scores is NOT supported by research?

A) Females tend to slightly but consistently outperform men in tests of verbal abilities including reading and writing.
B) Males tend to slightly but consistently outperform women in tests of math and tasks involving visual or spatial ability.
C) In terms of general intelligence, there is no difference between men and women in average overall IQ.
D) African Americans tend to score lower than White Americans on intelligence tests due to genetics rather than environment.