Answer:
C. The benefits of going on the vacation exceed the cost of working for a month to pay for the vacation
Explanation:
The benefits of vacation exceeds working because of the psychological benefits of the vacation. Because of the necessity of the vacation, even though you had to work for one month in order to save enough for the vacation, the benefits the person would enjoy because they went on this vacation would be more than what it cost for a month to pay for the vacation.