Which of the Following Is NOT a Reason for the Decline

Which of the following is NOT a reason for the decline in traditional families?

A) an increase in single parent households as a result of divorce
B) an increase in single individuals as the median age of marriage is delayed
C) an increase in sole survivors as our population ages
D) a change in the way the Census Bureau has defined "traditional family"
E) All of the above are reasons for the decline in traditional families.