Which of the Following Statements About Gender Difference in Unipolar

Which of the following statements about gender difference in unipolar depression is true?

A) Biological factors have been most clearly linked to the development of depression in those who do not have a family history of mood disorders.
B) Gender differences in depression are seen in all cultures and at all ages.
C) As a biological basis for the gender differences in depression has not been established, researchers have sought a psychosocial explanation.
D) The finding that boys are more likely to be depressed than girls prior to puberty is consistent with the established role of hormones in the development of depression.