Which of the following has the same meaning as "peers" in Paragraph 7

A．Men often mistreat their children.
B．Depressed women often have depressed partners.
C．All young children are vulnerable to social problems.
D．Women with children often have depressed partners.

A．see what kind of family environment is ideal for children to grow up in
B．investigate why so many men get depressed when a child is born
C．study whether family structure affects depression in men when child is born
D．see whether it is true that behind every depressed man there is a depressed woman