Final answer:
'Disaster' in the passage refers to the death of Oedipus and the blinding of Jocasta.
Step-by-step explanation:
'Disaster' in the passage refers to option 4: the death of Oedipus and the blinding of Jocasta. In the play, Oedipus blinds himself after discovering that he had unknowingly killed his father and married his mother. Jocasta, upon realizing the truth, takes her own life. These events can be considered as the disaster mentioned in the passage.'