Which Individual Is Most Likely Experiencing a Delayed Grief Reaction

Which individual is most likely experiencing a delayed grief reaction?

A) A 22-year-old army pilot on leave from the Iraq war who talks about the death of his crew member.
B) A 93-year-old women, whose husband of 73 years died 1 year ago, who reminisces about their life together.
C) A 54-year-old man who just completed a 28-day inpatient rehabilitation who is talking about the death of his wife 3 years ago.
D) A child whose parents were divorced 3 months ago and is acting out at school.