Research on Moral Reasoning Suggests That ____

 Research on moral reasoning suggests that ____. 

A) women's moral reasoning is becoming more like men's moral reasoning
B) moral systems in the U.S. tend to emphasize the well-being of the group in regulating values​
C) by adulthood, most people have progressed to postconventional moral reasoning​
D) humans have a built-in or innate moral sense that evolved to facilitate cooperative living​