Explanation: Context clues are hints that an author gives to help the readers to understand a difficult or unusual word within a sentence or paragraph. In the given excerpt from "The World with a Thousand Moons" we can see that the author gives context clues to help us understand the word "taut," by saying that Kenniston's voice taut because of the desesperation, we can know that this word means "tense" (corresponding to option D).
