Which Statement About the Social Experience of Single Mothers Is

Which statement about the social experience of single mothers is correct?

A) Most lone-parent families are a result of the dissolution of a relationship.
B) The proportion of Canadian families led by single mothers has been decreasing over the past 25 years.
C) Single mothers do not face any increased risk of physical or mental health problems.
D) As many single mothers, as married mothers have children who are well adjusted, smart and sociable.