Of the Following Individuals, Who Is Most at Risk for Suicide

Of the following individuals, who is most at risk for suicide?

A) Zeke, who is 75, lives with his daughter and is in poor health
B) Barbara, who is 80, in good health but was recently divorced
C) Karen, who is 65, recently widowed and has moved to a retirement community to be closer to friends
D) Mark, who just turned 80, is depressed over his health problems and drinks to feel better