According to the First Stasimon, the Chorus exposes what is known and what is unknown. What fact would you select to confirm what the Chorus knows? According to the First Stasimon, the Chorus appears certain that Oedipus is the murderer. According to the First Stasimon, the Chorus appears certain that Oedipus is not the murderer. According to the First Stasimon, the Chorus appears certain that Oedipus is really the son of Laius. According to the First Stasimon, the Chorus appears to know that Oedipus is Polybus's son.