Why Is the Research of Herrnstein and Murray (1994) and Rushton

Multiple Choice

Why is the research of Herrnstein and Murray (1994) and Rushton and Jensen (2005) controversial?

A) The research has found no practical use for IQ tests.
B) The research suggests that racial differences on IQ scores are determined by heredity.
C) The research does not support any predictive validity of IQ tests.
D) The research questions whether current conceptions of IQ are adequate.