Which Individual Is Most Likely to Succeed in Her/his Goal

Which individual is most likely to succeed in her/his goal of losing weight?

A) Susan, who is going through a divorce and has two small children
B) Bob, who was just laid off from his job
C) Melissa, who is in the middle of studying for final exams in college
D) Dan, who is happily married and likes his job
E) Karen, who has just relocated to a new city after graduating from college