Zoe Was Adopted Several Years Ago

Zoe was adopted several years ago.Her adoptive mother was recently diagnosed with depression.Knowing Zoe's biological parents have no history of depression,what effect does her adoptive mother's diagnosis have on Zoe's risk of developing depression?

A) Zoe's risk does not change.
B) She is only at risk if her adoptive mother was diagnosed with bipolar depression.
C) Zoe is at increased risk
D) Zoe is at a decreased risk.