【单选题】

How warm parents are with their children has a strong influence on the childrens personalities.Boy who are highly masculine, for example, tend to see their fathers as very warm and regarding. The warmth of both parents tends to lead to more feminity in girls. The influence of the fathers seems to be more important, since fathers generally treat male and female children differently as compared to mothers who treat male and female children in a more similar manner.

The passage is mainly about ______.A．male children and how they develop a sex role
B．female children and how they develop a sex role
C．babies and how they are affected by their parents
D．parental warmth and its effects