According to the "Family Is Changing,not Deteriorating" Perspective

According to the "family is changing,not deteriorating" perspective,

A) family problems such as desertion,out-of-wedlock birth,and child abuse have always existed.
B) the mother who works outside the home is a new phenomenon.
C) few single-parent families existed prior to 1950.
D) divorce did not become available until the late twentieth century.