A professor teaches political science at a small private liberal arts college. The professor frequently teaches students enrolled in his course that the current system of government in the United States is corrupt and that there should be a revolution immediately. The professor repeats these arguments in articles he writes for a variety of radical newspapers and online publications, but his calls for revolution are ignored. The professor is arrested and charged under a state statute that criminalizes teaching the necessity of the violent overthrow of the state. The professor files a motion seeking to have all charges against him dropped on the grounds that the statute is unconstitutional. Should the professor's motion be granted? A. Yes, because a person cannot be convicted for speech that calls for the violent overthrow of the state. B. Yes, because it is not likely that a revolution is going to result from the professor's speech. C. No, because the professor's speech is not protected by the First Amendment. D. No, because the professor has engaged in incitement to violent action