4.What does a heritability of 8 for intelligence mean?
(A) The diffcrences in intelligence across the whole population are 80 percent attributable to environmental variations between that population's members.
(B) The differences in intelligence across the whole population are 80 percent attributable to genetic variations between that population's members.
(C) Eighty percent of a specific person's intelligence is caused by the interaction of her genes and environment.
(D) Eighty percent of a specific person's intelligence is caused by her genes.