Refer to Stories from the Iliad: "Agamemnon's Appeal to Achilles." What is a central idea in "Agamemnon's Appeal to Achilles"?

a The gods do not involve themselves in human wars.

b Agamemnon finds that buying forgiveness is impossible.

c To be respected and followed, Agamemnon should have treated Achilles fairly.

d Agamemnon's singular wrong act did not destroy years of favor with Achilles.