People in and Out of the Psychology Profession Have Been

People in and out of the psychology profession have been engaging in the nature vs. nurture debate pertaining to child development for ages. What answers, if any, can the recent research by neuroscientists offer on this topic?

A) While the role of environment can never be excluded, the predominant determinants of a child's behavior are genetic.
B) While the role of genetic factors can never be completely excluded, children's behavior is primarily influenced by their environment.
C) Since neurobiology is just in its infancy, no definitive answer can be given as yet as to which of the two factors is more important, but further research in this area seems promising.
D) Genetic and environmental factors intertwine in complex ways to make each child's personality and behavior what it is.