Final answer:
Creon accuses Ismene of being guilty of complicity in the burial of Polyneices.
Step-by-step explanation:
The correct answer is C) complicity. Creon accuses Ismene of being guilty of complicity in the burial of Polyneices. He believes that by assisting Antigone in burying their brother, Ismene is also responsible for the act of defiance against his decree. Creon views Ismene's involvement as a betrayal of the state and considers her deserving of the same punishment as Antigone.