You are correct. The answer is C. If you have a strong argument with facts to back up your speech, you will go a long way. Lack of emotion will definitely not help. You need to express what your idea is, in a way the audience understands. An angry tone will not convince them. You need to be serious, but not angry. Humor will not help because you need to get your point across. Jokes and laughing will not help. Your answer is C.
