How Does the Social Clock in American Culture Affect the Age

How does the social clock in American culture affect the age at which women have children in the 21st century?

A) Women are more likely to remain single,but still bear children.
B) Many believe that people should be socially and economically stable before bringing children into the world.
C) Many believe that it is even more important to find a husband who is financially stable now than in the 20th century.
D) The average age at which a woman delivers her first child is now almost 30.