Final answer:
The correct answer is option a. Professor Plum's statement 'Maybe it wasn't one of us' is indicative of denial of involvement in the crime, aligning with option (a) from the multiple-choice interpretations presented.
Step-by-step explanation:
The question revolves around interpreting a character's statement from a play, which fits within the domain of English, specifically in literature analysis. In this context, Professor Plum's line 'Maybe it wasn't one of us' is being scrutinized to determine his intent or meaning in that dialogue. Given this snippet of dialogue, Professor Plum denies involvement in the murder, which corresponds to option (a).
The provided excerpts from various texts also represent fragments of different narratives, hinting at themes such as suspicion, guilt, and the complexity of criminal investigations. These dialogues are from different works and showcase how characters interact in the face of a crime, how evidence can be interpreted, and how people may or may not accept culpability. The lines portray various shades of character responses in situations involving a criminal act or investigation.