If the Link Between Maternal Depression and Child Depression Were

If the link between maternal depression and child depression were purely genetic,which of the following would you expect?

A) Adopted children would show no particular relationship between their depressive status and their adoptive parents' depressive status.
B) Twins raised apart would not be similar in their depressive status.
C) Biological siblings would be more similar in their depressive status than parents and children would be.
D) Parents who were discordant for depression would have the highest rate of depression in their children.