John Proctor
Explanation:
John Proctor is the protagonist of the play. Once he enters the play, the real plot begins. Up to that point, the play's exposition has introduced the town, some of the people in the town and the situation that will drive the plot: the accusations of witchcraft.
Its a dependent clause because it can't stand alone, it doesn't make sense
D because the plot always needs to be shown whether directly or indirectly
