Which Statement Regarding Differences in IQ Is NOT Supported by Research

Which statement regarding differences in IQ is NOT supported by research findings

A)  The average IQ for many of the larger minority groups in the United States is about 3 to 15 points lower than it is for whites. 
B)  Children from the lowest social classes score about 15 points lower on IQ tests than do children from the highest social classes. 
C)  The average difference in IQ between minority groups and whites is largely a function of genetic factors. 
D)  Group differences in average IQ can be influenced by environmental factors, even if the heritability of intelligence is high.