Actor: Bertolt Brecht' s plays are not genuinely successful dramas. The roles in Brecht' s plays express such incongruous motives and beliefs that audiences, as well as the actors playing the roles, invariably find it difficult, at best, to discern any of the characters' personalities. But, for a play to succeed as a drama, audiences must care what happens to at least some of its characters. The conclusion of the actor's argument can be properly drawn if which one of the following is assumed? ["An audience that cannot readily discern a character's personality will not take any interest in that character.", "All plays that, unlike Brecht's plays, have characters with whom audiences empathize succeed as dramas.", "The extent to which a play succeeds as a drama is directly proportional to the extent to which the play's audiences care about its characters.", "A character's personality is determined primarily by the motives and beliefs of that character."]