Answer:
B). because later Oedipus will refuse to act on what the oracle tells him.
Step-by-step explanation:
In odeiplus when the Oracle tells him what to do he refuses to do as the Oracle says, that´s why the sentece reflects certain irony because he basically says that he will be foolish, or a wicked man, if he does not do as the Oracle wishes, and he eventually refuses to do as the Oracle tells him, and he eventually fulfills his fate eventhough he does as much as he can to avoid it.