Which of the following statements about heredity and intelligence is true? (2 points) a similarities in intelligence between identical twins who were separated at birth and raised in different houses must be due to heredity. b differences in intelligence between identical twins who were separated at birth and raised in different houses must be due to heredity. c differences in intelligence between identical twins must be due to differences in their environments. d if identical twins are separated at birth and raised in different homes, yet still have similar intelligence scores, the similarity in their scores must be due to hereditary influences. e prenatal influences have little, if any, influence on intelligence and need not be taken into account when studying environmental influences.