Answer: B) It is wise to know the enemy you face.
Explanation: In literature, the theme is the underlying message of a story, it is what critical belief about life is the author trying to convey in the writing of a novel, play, short story or poem. Usually this belief, or idea, is universal and transcends cultural barriers. In the given excerpt from "The Odyssey" the conflict between Odysseus and the Cyclops reveals the theme that it is wise to know the enemy you face, because Odysseus mentions that Zeus will avenge the unoffending guest without knowing that the Cyclopes don't care at all about Zeus and the other gods.