According to the Text,when Does Gender Socialization by Parents Begin

According to the text,when does gender socialization by parents begin?

A) Starting at about 18 months of age,parents act toward children on the basis of the child's sex.
B) Before the baby is even born,parents want to know the gender of the baby,and once the sex is known,parents see the baby by their gender.
C) Children's toys often contradict their parents' gender expectations.
D) When old enough to do household chores,children are usually assigned the same chores,irrespective of gender.