The Incidence of Stepfamilies in the United States Since the Early

The incidence of stepfamilies in the United States since the early 1900s

A) has not changed, but the reason for forming a stepfamily has changed from the loss of a parent through death to the dissolution of a marriage through divorce.
B) has tripled because of the substantial increase in the number of divorces.
C) decreased substantially because so few couples actually married before 1900.
D) has increased by 70% because there are more divorces and more parents today simply walk away from their family when the marriage is in trouble.