An automobile mechanic works exclusively in the repair department of an automotive dealership that has a: new car department, a used department, and a repair department. Which of the following statements is true about the mechanic's salary?

a. If the cost object is the dealership, the salary is a direct cost

b. If the cost object is the repair department, the salary is a direct cost

c. If the cost object is a job done by the mechanic, the salary is an indirect cost

d. All of the above are true