Who Is Most Likely to Feel Worried About Being "Off

Who is most likely to feel worried about being "off time" in his social clock?

A) Pete, age 21, who changed his major and so won't graduate for an additional year
B) Jaime, who graduated from college at age 23
C) Li, age 40, who decides to change careers and go to medical school
D) Faron, who is marrying Freda right after grad school, at age 28