Which Employee Best Exhibits Organizational Citizenship Behavior

Which employee best exhibits organizational citizenship behavior?

A) Greyson: an efficient manager who doesn't work beyond the minimum hours stipulated by his company
B) Moses: an efficient manager who, as a matter of principle, never consents to work on weekends
C) Kara: a hardworking employee who is willing to work overtime for her company if a project necessitates it
D) Seth: an astute employee who is always on the lookout for better jobs
E) Vicky: an agreeable manager who has a high need for affiliation and a low need for achievement