Which of the following statements regarding differences in iq is not supported by research findings? a. group differences in average iq can be influenced by environmental factors, even if the heritability of intelligence is high. b. the average difference in iq between minority groups and caucasians is largely a function of genetic factors. c. children from the lowest social classes score about 15 points lower on iq tests than do children from the highest social classes. d. the average iq for many of the larger minority groups in the united states is about 10 to 15 points lower than it is for caucasians.