Steve refers to himself as a "Monster" primarily because it relates to the feeling that permanently goes along with being in jail (B). It reflects his internal struggle and the perception society might hold of him as an accused individual.
How to explain
In the passage, "acknowledge" is used as a verb meaning "to recognize or accept" (A). It indicates the importance of behaving seriously in court while allowing a gesture of recognition towards his mother.
The lines (paragraphs 41-42) reveal that while Steve's trial means life-or-death for him, it is business-as-usual for others (A). The nonchalance of the stenographer and guard showcases the routine nature of such cases for them.
The passage (paragraphs 49-50) suggests that Steve feels more comfortable painting a picture of his emotions than directly confessing them (B). His evident fear contrasts with the composed demeanor of James King.
The inference about Kathy O'Brien best supported by the text is that she sees her role in Steve's case as one of formal duty (A). Her commitment to ensuring the law works for Steve indicates a sense of professional responsibility.
The statement that most strongly supports Kathy O'Brien seeing her role as one of formal duty is: "My job is to make sure the law works for you as well as against you, and to make you a human being in the eyes of the jury."
The best-supported statement about Steve is that he tells his story as a screenplay because he feels detached from what is happening (B). Writing it as a screenplay allows him to distance himself from the emotional weight of the trial.
The sentence that strongly supports the idea of Steve feeling detached from what's happening is: "The film will be the story of my life. No, not my life, but of this experience." This suggests a disconnect between the events and his personal life.