Answer:
d. are usually hired by the producer
Step-by-step explanation:
Producers, directors, actors, supporting cast and the other team members together are the important personnel involved in a theatre. A producer is the most powerful or the deciding authority of the theatre. He takes the decision of what is to be played and what he want the audience to view. He is also authorized to posses the command of budget control. He appoints the director and it is the director who presents the thoughts of the producer through the mode of the plays.