Marie's Sister Died 3 Years Ago

Marie's sister died 3 years ago.Marie is consistently bothered by sleeping problems,restlessness,and irritability.She often finds herself weeping uncontrollably because she misses her sister so much.Which of the following is probably TRUE of Marie?

A) She is recovering very quickly from her sister's death.
B) She is moving through the stages of grief and will eventually recover.
C) She is as recovered as one can hope to be from the death of a loved one.
D) She is experiencing an unusually long grief period and should seek help.