Final answer:
Adolphe Le Bon in "The Murders in the Rue Morgue" was the suspect arrested for the murders, but was not the actual perpetrator. The detective, C. Auguste Dupin, proves Le Bon's innocence in the story.
Step-by-step explanation:
Adolphe Le Bon was the suspect who was arrested for the murders of Madame L'Espanaye and her daughter in "The Murders in the Rue Morgue." Therefore, the correct answer is c) Suspect. In the story, Adolphe Le Bon is a bank clerk who becomes entangled in the murder case due to his association with the payoffs he delivered to the victims on behalf of the bank. Despite being arrested, he is neither the witness to the crimes nor the actual perpetrator, and the detective in the story, C. Auguste Dupin, eventually exonerates Le Bon as he unravels the true events behind the mysterious murders.