Which of the Following Best Expresses Diane Halpern's Psychobiosocial Viewpoint

Which of the following best expresses Diane Halpern's psychobiosocial viewpoint on the development of gender roles?

A) The effects of biology and the environment must be separated if we are to fully understand the development of gender roles.
B) Adaptive evolutionary processes that predispose males and females to take on different social roles cause sex differences in most psychological traits.
C) Differential exposure to spatial or verbal experiences during the first year of life results in sex differences in cognitive abilities.
D) Prenatal exposure to male or female hormones influences the organization of male and female brains.