The Chorus don't think Oedipus is guilty because there is no proof. Oedipus has already proved his wisdom by solving the Sphinx riddle and in turn saved the city from the Sphinx. The Chorus see him as a hero. They believe Oedipus over Teiresias.
The answer of this question is: C. They want proof.
Explanation:
The Chorus had a thought feeling that Oedipus is not guilty at all because there is no such evidence that comes around in its scale. Oedipus had previously given away the evidence of his wisdom all through by bringing the solution of Sphinx riddle.
