The fact that the IQ scores of two-thirds of the impoverished people in the US who are Caucasian are not significantly different from those of ethnic minority groups would support the notion that

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The fact that two-thirds of impoverished Caucasians have similar IQ scores to ethnic minority groups indicates that poverty, not genetics, is likely the cause of lower IQ scores in certain groups. This supports the idea that IQ differences between African Americans and Caucasians may be due to poverty rather than genetic differences. Option A is incorrect because it suggests that genetic differences are the cause, which is not supported by the given information. Option C is also incorrect because it is based on a false assumption that poverty and dullness have a causal relationship. Option D is incorrect because it presents an unsupported claim about IQ decline for Caucasians and African Americans.

The Fact That the IQ Scores of Two-Thirds of the Impoverished