Answer:
The answer is option D. (Single parent and other types of families are in creasing)
Explanation: In America the family types are changing. The single parent and other types of family are increasing. The full parental family is at stake in US due to the high increasing rate of divorce, giving birth of a child without marital partner, remarriage. So back in 1960's the two parent family was dominant in US which was 73%. But now this rate has dropped to 46% as a result of single parenting family.