Amie was recently hired at Kreigmeister Industries as a repairperson. She was informed that if she chose not to join the union representing her fellow repair workers, she would still have to pay a fee to the union. Apparently, Kreigmeister operates under a(n):A. illegal arrangement, since nonmembers can never legally be required to pay fees to unions.B. closed shop agreement.C. union shop agreement.D. agency shop agreement.