The reference to the location of textual evidence in a primary source.
Teiresias intervened in King Creon's punishment to the people of Thebes by telling him that the royal family will suffer the same fate.However, King Creon ignored his words and rather insulted Teiresias. Because of this, the blind councilor left the King.
The answer is: The events leading up to graduation.
Either c or d, not exactly sure. I think c is the most logical answer since its in the best interest of everyone involved.