If an investigator conducted a twin study of intelligence with African?-American children, finding that the heritability of IQ in this sample was +.75, she could conclude that
A) IQ is an inherited attribute
B) about 75% of a person's IQ is due to the genes he(she) has inherited
C) the heritability of IQ should be approximately the same among twins from other ethnic backgrounds
D) none of these
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