I choose A, because it makes more sense to me than the other answers, B also makes sense but as in the beginning of the poem says, "You are flung on the sand". Makes me imagine there perhaps is a sandstorm occuring on the beach.
Explanation: A job is only for a certain time. A salary is the money you make during your time at a job. A workforce is an area of work multiple people work in. This leaves the only remaining answer as Career.
