1) C
Question Type: Vocabulary
credible (adjective): reliable, believable, trustworthy.
In paragraph 2, the author says: “Ethos is a speaker’s way of convincing the audience that she is a credible source.” We can use context clues—hints from known words or phrases around the unknown word or phrase—to help us figure out what the word credible most nearly means. The author explains that “an audience will consider a speaker credible if she seems trustworthy, reliable, and sincere,” and then adds: “if an audience cannot trust you, you will not be able to persuade them.” The words “trustworthy, reliable, and sincere” are especially good clues about what credible means. Based on these quotations, we can see that a credible person is someone you can trust. Because the question is asking for an antonym, we are looking for a word that means the opposite of trustworthy. You would not trust someone who was dishonest, disloyal, or a cheater. We can tell that we are looking for a word that means dishonest. Therefore (C) is correct. Based on the above information, we can tell that we are looking for a word that means dishonest. Unintelligent does not mean dishonest. Therefore (A) is incorrect. Based on the above information, we can tell that we are looking for a word that means dishonest. Boring does not mean dishonest. Therefore (B) is incorrect. Based on the above information, we can tell that we are looking for a word that means dishonest. Amazing does not mean dishonest. Therefore (D) is incorrect.