Answer: D. Person vocation fit
Explanation: Given that a programming job is not a bad job at all, here's a case where Peter has a problem with vocation, i.e person vocation fit. The vocation of the programmer is such that Peter is isolated from his colleagues all day long, which is not his fit at all, because he is sociable and likes to work with colleagues during his working days.
According to research, person vocation fit is important because a particular career, vocation affects the well-being of the individual. If an individual is satisfied with a chosen vocation, then that satisfaction will also affect career progression, achievement. These are all parameters of an individual's well-being, and the same research has shown that there is a positive correlation between the chosen career / vocation and well-being.