Which of the Following Is True of the Field of Developmental

Which of the following is true of the field of developmental science?

A) The biological basis of human development has already been well understood.
B) Cultural processes are not considered to play a large role in human development.
C) Intervening to promote children's health and well-being is beyond the scope of developmental scientists' activities.
D) Interdisciplinary and international efforts combine to contribute to existing knowledge about human development.