Which of the following is most likely an extended effect of Creon’s edict toward Polyneices?

It caused fear among the surviving family members.
It established Creon’s authority as ruler of Thebes.
It alienated all of Polyneices supporters.
It brought favor to Creon from all Eteocles’ supporters.

It caused fear among the surviving family members.

It established Creon’s authority as ruler of Thebes.

Explanation:

The myth of Antigone by Sophocles tells the story of how Antigone was killed for disobeying her king and rather do what she feels right in the eyes of the gods. This story reveals what power the king has over everyone, despite their relationships with the king himself.

In the story, we find Ismene greatly disturbed and afraid of what her sister Antigone plans to do with their brother Polyneices's dead body. She warned her not to bury him for that will entail disobeying the very decree of their king, "But think of the danger! Think what Creon will do! " Ismene presents the fear that the relatives of the dead person have and the fear of their king. She also presents the power that the king has over the land when she said "I must yield To those in authority. And I think it is dangerous business  To be always meddling". It seems to establish the power of Creon over all of Thebes, for none dares to disobey his words except Antigone.

Thus, the extended effect that king Creon's edict most likely pose is the fear of the king among the relatives and the power of the king over all of the land.