A Client Was Diagnosed with Depression Resulting from the Loss

A client was diagnosed with depression resulting from the loss of her twin sister in a skiing accident. Her parents reported that all the client has done since the accident was lay in her bed and cry, asking why she survived the accident. The physician prescribed Prozac to treat the depression and suggested that the parents "keep a close eye on her." After a week, the client began to show some signs of improvement, even coming out of her room to eat with the family. After 2 months, the client committed suicide despite seeming to come out of the depression. What is the likeliest reason?

A) The Prozac prescription was not effective.
B) Suicide risk can increase early in treatment with antidepressants.
C) The client was not kept under direct supervision.
D) A preexisting mental illness was compounded by the death of her sister.