Amie Was Recently Hired at Kreigmeister Industries as a Repairperson

Multiple Choice

Amie was recently hired at Kreigmeister Industries as a repairperson. She was informed that if she chose not 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.